Articles de revues : « Bacteria spp »

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EVANGELOPOULOU, GRAMMATO, GEORGIOS FILIOUSSIS, SPYRIDON KRITAS, MARIA KANTERE et ANGELIKI R. BURRIEL. « Isolation and antimicrobial testing of Aeromonas spp., Citrobacter spp., Cronobacter spp., Enterobacter spp., Escherichia spp., Klebsiella spp., and Trabulsiella spp. from the gallbladder of pigs ». Polish Journal of Microbiology 64, n^o 2 (2015) : 185–88. http://dx.doi.org/10.33073/pjm-2015-028.

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The presence of Gram-negative bacteria species, other than Salmonella spp., in the gallbladder of pigs was examined. Isolated Gram-negative bacteria were assigned to species using the Microgen™ GnA+B-ID Systems. Of the 64 isolated strains 43 were identified as Escherichia coli, seven as Enterobacter spp., three each as Klebsiella spp., Citrobacterfreundii, Aeromonas hydrophila and Cronobacter sakazakii and one each as Escherichiafergusonii and Trabulsiella guamensis. Their antibiograms showed very high resistance to ampicillin, amoxicillin, tetracycline, chloramphenicol and sulfamethoxazole/trimethoprim. It was concluded that the pigs' gallbladder is a reservoir of potentially pathogenic Gram-negative bacteria for pork consumers.

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Costa, Arthur Roberto da, Roberta Torres Chideroli, Larissa Melo Chicoski, Diego Candido de Abreu, Leonardo Mantovani Favero, Natália Amoroso Ferrari, Raffaella Menegheti Mainardi, Vanessa Gomes da Silva et Ulisses Padua Pereira. « Frequency of pathogens in routine bacteriological diagnosis in fish and their antimicrobial resistance ». Semina : Ciências Agrárias 42, n^o 6 (12 août 2021) : 3259–72. http://dx.doi.org/10.5433/1679-0359.2021v42n6p3259.

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Aquaculture is one of the sectors of animal husbandry with the fastest growth rate. However, the increase in the sector’s production chain without proper management can result in factors that favor the development of diseases, especially infectious diseases caused by bacteria. Many factors, such as agriculture or industry resides, improper use of antibiotics in animals or humans, have contributed to increased environmental pressure and the appearance of antibiotic-resistant bacteria, while residues from these drugs can remain in the carcasses and in water a risk to public and environmental health. From that, we identified the bacterial genus/species and their bacterial resistance to antibiotics from samples received from fish disease outbreaks for bacteriosis diagnosis between January 2017 and October 2020. Isolated bacteria were subjected to the Kirby and Bauer sensitivity test for five classes of antibiotics (penicillins, fluoroquinolones, aminoglycosides, amphenicols, and tetracyclines). Of the 181 analyzed outbreaks, 232 bacteria were isolated, including Streptococcus spp., Aeromonas spp., Edwardsiella spp., Plesiomonas shigelloides, Pseudomonas aeruginosa, Chromobacterium violaceum, Flavobacterium spp., Citrobacter spp., Enterococcus spp., Vibrio spp., Enterobacter spp., Chryseobacterium meningosepticum. Of the 232 bacteria, 40 strains were classified as multidrug resistant (MDR), with Plesiomonas shigelloides, Aeromonas spp., and Edwardsiella spp. representing more than half of this number (22/total). With several bacteria demonstrating resistance to Brazilian aquaculture-legalized drugs (tetracycline and florfenicol), it is mandatory to research, not only for alternatives to the use of antibiotics, but also for other drugs effective against the main circulating bacterial pathogens. In addition, vigilance over the occurrence of resistant bacteria is necessary, considering the appearance of zoonotic bacteria with multi-resistant characteristics, becoming a public health concern.

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Patel, Binal R., MT Panchal, AJ Dhami, RA Mathakiya et BB Bhanderi. « Bacterial Isolates from the Genital Aspirates of Cyclic, Acyclic, Endometritic and Pregnant Buffaloes ». INDIAN JOURNAL OF VETERINARY SCIENCES AND BIOTECHNOLOGY 15, n^o 02 (25 novembre 2019) : 56–59. http://dx.doi.org/10.21887/ijvsbt.15.2.15.

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The study was carried out on 50 vaginal secretions/aspirates/discharge samples collected aseptically using syringe and pipette method from infertile (anestrus; endometritic, n = 6 each) buffaloes of villages nearby Anand and healthy cyclic (n = 5; proestus, estrus, metestrus, diestrus) as well as 3, 6 and 9 month pregnant (n = 6 each) buffaloes of University farm to identify the vaginal microorganisms based on routine cultural examination. In all 117 bacterial isolates were recovered from all 50 vaginal samples (100 %) of 35 buffaloes during different physio-pathological status. The bacteria isolated from vaginal mucus/aspirates of buffaloes during the follicular phase comprised Corynebacterium spp. as the most predominant isolate (28.57%) followed by E. coli, Bacillus Spp., Staphylococcus spp., Streptococcus spp., Salmonella spp., Proteus spp., and vaginal yeast, whereas during the luteal phase, the most predominant bacteria were E. coli (23.33%) followed by Corynebacterium spp., Bacillus spp., Staphylococcus spp., Streptococcus spp., and Klebsiella spp. In acyclic buffaloes, the most predominant bacteria isolated were Corynebacterium spp. (21.43%) Bacillus spp., Micrococcus spp., Pseudomonas, Staphylococcus spp., Streptococcus spp., E. coli and Salmonella spp., whereas the endometritic buffaloes evinced the most predominant bacterial isolates as Corynebacterium spp. and E. coli (20.00% each) followed by Bacillus spp., Salmonella, Proteus spp., Staphylococcus spp., Streptococcus spp., and Klebsiella spp. The major bacteria isolated during the entire period of pregnancy were E. coli, Micrococcus, Corynbacterium Spp., Bacillus spp., Staphylococcus spp. and Proteus. This study concludes rich bacterial diversity in the vagina of buffaloes during different physio-pathological status.

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Akter, Tangin, Sangita Ahmed et Hasanuzzaman. « Occurrence of Gram-negative bacteria in cockroaches obtained from different areas of Dhaka city ». Bangladesh Journal of Zoology 44, n^o 2 (13 juin 2017) : 229–36. http://dx.doi.org/10.3329/bjz.v44i2.32762.

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The presence of Gram-negative bacteria in cuticle and alimentary tract of cockroaches collected from four selected areas of Dhaka city was investigated. Using detection key, a total of 12 cockroaches were identified as Periplaneta americana (58.33%), Blattella germanica (33.33%) and Blatta orientalis (8.33%). From these three species 54 different bacterial isolates were obtained. Out of them, 33 were obtained from P. americana (14 from external and 19 from gut), 9 from B. orientalis (5 from external and 4 from gut) and 12 from B. germanica (5 from external and 7 from gut). Bacterial isolates obtained from external surface of the cockroaches belonged to four different Gram negative bacterial species (Klebsiella spp., Pseudomonas spp., Enterobacter spp. and E. coli), six bacteria have been obtained from alimentary tract (Klebsiella spp, Pseudomonas spp., Enterobacter spp., Escherichia coli, Salmonella spp. and Shigella spp.). Pseudomonas spp. were the most predominant bacteria isolated from external surface (33.34%) while Klebsiella spp. were found to dominate in alimentary tract (23.33%). P. americana carried the highest number (33) of bacterial isolates and B. orientalis carried the minimum (9). This study shows that cockroaches carry several bacteria on their external body surface and alimentary tract and can play a role in bacterial transmission to humans. Therefore, the existence of cockroaches in human dwellings is a serious public health problem.Bangladesh J. Zool. 44(2): 229-236, 2016

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Alam, Nur E., Md Rayhan Ali, Md Tarek Molla, Shahin Mahmud, Kaisar Ali Talukder et AKM Mohiuddin. « Therapeutic Potential of Plant Extracts Against Multidrug Resistance Poultry Bacteria ». Plant Tissue Culture and Biotechnology 30, n^o 1 (25 juin 2020) : 119–30. http://dx.doi.org/10.3329/ptcb.v30i1.47797.

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Plant extracts were evaluated on bacteria isolated from poultry farm for developing substitutive therapeutic agent of antibiotics. A diverse range of bacterial load observed both in total viable count (TVC) and in total coliform count (TCC) in 30 samples randomly collected from poultry feeds, drinking water and faeces. A total of six bacterial isolates e.g. Pseudomonas spp., Aeromonas spp., Citrobacter spp., Vibrio spp., Escherichia coli and Plesiomonas spp. were found in the samples cultured in MacConkey Agar medium. Fifteen antibiotics were studied against bacterial susceptibility. All the bacterial isolates exhibited multi-antibiotic resistance (MAR) with gross resistance to erythromycin and ampicillin. E. coli had the highest MAR (53.3%), and Vibrio spp. as well as Plesiomonas spp. both had the same MAR (46.7%). Methanolic extract of Terminalia chebula and Azadirachta indica showed significant zone of inhibition against all the tested bacteria. These findings confirm the presence of multidrug resistant bacteria in poultry environment that reveals a possibility of cross-contamination to human and animals. The plant extracts could be developed into therapeutic drugs to rein antibiotic poultry resistant bacteria. Plant Tissue Cult. & Biotech. 30(1): 119-130, 2020 (June)

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Korochkina, Elena A., Andrey Nechaev, Anatoly Stekolnikov et Anatoliy Nezhdanov. « PSVI-41 The comparative analysis of vaginal flora of high-productive cows in the postpartum period by Real-time PCR ». Journal of Animal Science 97, Supplement_3 (décembre 2019) : 199–200. http://dx.doi.org/10.1093/jas/skz258.411.

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Abstract The aim of the study was the comparative analysis of species composition of vaginal bugs of high-productive cows (n = 7) in the postpartum period by Real-time PCR. The material were vaginal discharge of cows (four of them had acute pyogenic endometritis, another was apparently healthy). The vaginal discharge of sick cows contained the low count of bacteria Megasphaera spp., Veillonella spp., Dialister sрp., Lactobacillus spp. and streptococcus. The evaluation of bacterial count of Lachnobacterium spp., Clostridium spp., actinomycetes Atopobium spp., bacteria Staphylococcus spp., and yeast fungi Candida spр. did not demonstrate statistically different between groups. Probably this bacteria were not the etiological origin of postpartum endometritis of cows. However, vaginal discharge of cows with diagnosis acute pyogenic endometritis had high count of bacteria of Fusobacteriaceae (6,0±3,8 and 5,3±2,6 lg genomes/g), Enterobacteriaceae (6,4±4,1 and 5,1±3,0 lg genomes/g), bacteroides of Prevotella spp. and Porphyromonas spp. (7,4±5,2 and 6,4±4,4 lg genomes/g), actinomycetes Mobiluncus spp. and Corynebacterium spp. (5,1±2,5 and 4,7±1,9 lg genomes/g), Peptostreptococcus spp. and Eubacterium spp., in comparison with apparently healthy cows. The presence of this bacteria in the vaginal discharge of apparently healthy cows suggestive that this bacteria are the permanent vaginal flora. Thus, comparative analysis of the dysbiotic sort of vaginal flora of cows in postpartum period demonstrated that vaginal discharge of cows with diagnosis acute pyogenic endometritis consists the high count of bacteria of potentially pathogenic and pathogenic groups (Fusobacteriaceae, Enterobacteriaceae, Prevotella spp., Porphyromonas spp., Mobiluncus spp., Peptostreptococcus spp., Eubacterium spp.).

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Moser, Cordula K., Christina Ukowitz, Ulrike Zitz, Florian Emerstorfer, Walter Hein, Wolfgang Kneifel et Konrad J. Domig. « Monitoring the Antibacterial Effect of Rosin Acids in an Austrian Beet Sugar Plant by Amplicon-Based Sequencing and Flow Cytometry ». Applied Sciences 11, n^o 2 (14 janvier 2021) : 737. http://dx.doi.org/10.3390/app11020737.

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For decades, microorganisms in beet sugar production have been studied using culture-based methods. However, these methods are not sufficient to describe such a complex bacterial community. In this study, therefore, an amplicon-based sequencing technique (Illumina MiSeq platform) was applied to characterize the bacterial community and its dynamics in the extraction area and juice purification station of an Austrian beet sugar plant. Depending on the process conditions thermophilic bacteria, such as Geobacillus spp., Caenibacillus spp., and Thermus spp., and mesophilic bacteria, such as Leuconostoc spp. and Bacillus spp., were found. Besides these microbiological characteristics, the antimicrobial effect of a rosin acid-based product (Defostab 220) on the bacterial communities was investigated in industrial and laboratory trials. The antimicrobial effect of a given concentration of rosin acid varies from bacteriostatic to bactericidal effects on different occurring groups of bacteria.

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Obuekwe, I. S., et C. K. Offodile. « ANTIBIOTIC RESISTANCE IN BACTERIAL PATHOGENS ISOLATED FROM CATTLE DUNG AND ITS CONTAMINATED SOIL ». African Journal of Health, Safety and Environment 1, n^o 2 (9 novembre 2020) : 66–83. http://dx.doi.org/10.52417/ajhse.v1i2.85.

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Cattle dung is used as organic fertilizer and alternative source of fuel or biogas but could also be a source of antibiotic resistance genes in the environment. This study isolated, identified and assessed antibiotic susceptibility pattern of bacteria from cattle dung and its contaminated soil. Bacteria isolation and identification were based on standard techniques while hemolytic activity was used to confirm potential pathogenic bacteria. Antibiotic susceptibility pattern of isolated pathogens were assayed by disk diffusion method. Among isolated bacteria, Staphylococcus spp had highest occurrence of 23.8 % while Micrococcus spp was the least at 1.3 %. Hemolytic bacteria isolates were Staphylococcus aureus (16.5 %), Bacillus spp (17.4 %), Nocardia spp (4.6 %), Escherichia coli (29.4 %), Pseudomonas spp (13.8 %), Serratia marcersens (2.8 %) and Salmonella spp (15.6 %). High resistance (100 %) against Ampiclox (30 µg) was observed in all Staphylococcus aureus and Bacillus spp isolates while Pseudomonas aeruginosa isolates showed 100 % resistance to Ofloxacin (30 µg). Most Gram-positive bacterial isolates were majorly resistant to Beta lactams while Gram negative bacteria were resistant to Fluoroquinolones antibiotics. Multiple antibiotics resistant index (MARI) was measured at greater than 0.2, and was observed in 71.5 % of the hemolytic pathogens. Antibiotics resistance in hemolytic bacterial pathogens from this study is indicative of environmental sources of antibiotic resistance and possible adverse effects on human health.

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Wagi, Shabana, et Ambreen Ahmed. « Bacillus spp. : potent microfactories of bacterial IAA ». PeerJ 7 (23 juillet 2019) : e7258. http://dx.doi.org/10.7717/peerj.7258.

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Background Auxin production by bacteria is one of the most important direct mechanisms utilized by plant growth-promoting bacteria (PGPB) for the betterment of plants naturally because auxin is a plant friendly secondary metabolite synthesized naturally by bacteria, and hence improves the growth of associated plants. So, the current study focuses on bacterial synthesis of Indole-3-acetic acid (IAA) for plant growth improvement. Methods In the current study, the PGPB were selected on the basis of their auxin production potential and their growth promoting attributes were evaluated. Indole-3-acetic acid producing potential of two selected bacterial isolates was observed by varying different growth conditions i.e., media composition, carbon sources (glucose, sucrose and lactose) and different concentrations of precursor. Influence of various physiological factors (temperature and incubation time period) on IAA production potential was also evaluated. Results Both the bacterial strains Bacillus cereus (So3II) and B. subtilis (Mt3b) showed variable potential for the production of bacterial IAA under different set of growth and environmental conditions. Hence, the IAA production potential of the bacterial isolates can be enhanced by affecting optimum growth conditions for bacterial isolates and can be used for the optimal production of bacterial IAA and its utilization for plant growth improvement can lead to better yield in an eco-friendly manner.

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Dick, A. A., et C. Wekhe. « Microbial Indoor Air Quality in a Secondary School in Port Harcourt City, Rivers State, Nigeria ». Journal of Applied Sciences and Environmental Management 24, n^o 7 (9 août 2020) : 1289–92. http://dx.doi.org/10.4314/jasem.v24i7.24.

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The microbial air quality of a Secondary School in Port Harcourt was investigated between 9- 9:30am and 2-2:30am employing plate exposure and count method for bacteria and fungi estimation. Results obtained from the study showed that bacteria counts from the school for morning session ranged from 4.8 x 103 cfu/m3 (Library) to 4.07 x 104 cfu/m3 (Staffroom) and for the afternoon 9.8 x 103 cfu/m3 (Library) to 4.66 x 104 cfu/m3(SS1A Classroom). Fungal counts ranged from 5.68 x 103 cfu/m3 (Library) to 2.07 x 104 cfu/m3 (SS3B Classroom) for the morning sessions and 6.56 x 103 cfu/m3 (Library) to 2.59 x 104 cfu/m3 (SS3B Classroom) for the afternoon session. Seven bacterial species, Bacillus spp., Enterococcus spp., Escherichia coli, Micrococcus spp., Pseudomonas spp. Staphylococcus aureus and Serratia spp and six fungal species, Alternaria spp., Aspergillus niger, Candida spp., Mucor spp., Penicillium spp., and Rhizopus spp were isolated. The bioaerosol concentrations were higher than recommended limit regardless of the sampling sessions. The high microbial counts and identified bacterial and fungal species may pose a serious problem to learning. Keywords: Microbial Air Quality, Classroom, Bacteria, Fungi, Niger Delta

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Sawadogo, Salfo, Birama Diarra, Cyrille BIsseye, Tegwindé Rebeca Compaore, Florencia W. Djigma, Djénéba Ouermi, Aboubakar S. Ouattara et Jacques Simpore. « Molecular diagnosis of Shigella, Salmonella and Campylobacter by multiplex Real-time PCR in stool culture samples in Ouagadougou (Burkina Faso) ». Sudan Journal of Medical Sciences 12, n^o 3 (6 septembre 2017) : 163. http://dx.doi.org/10.18502/sjms.v12i3.931.

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ABSTRACT:Background: Bacteriological diagnosis of Campylobacter spp, Salmonella spp and Shigella spp could be necessary in the case of infectious gastroenteritis syndrome.The objective of this study was to diagnose concomitantly the three enteropathogenic bacteria by multiplex Real-Time PCR in stool culture samples in Ouagadougou (Burkina Faso).Materials and Methods: The study was conducted from February 5th to March 9th, 2013. Two hundred stool samples were received during the study period. The bacteria were identified by bacterial culture following by multiplex Real-Time PCR.Results: Shigella spp and Campylobacter spp were sought by culture in all 200 samples. Enteropathogenic E. coli was sought only in 37 samples from all children under 2 years old. The bacterial culture was positive in 12 stool samples. Shigella spp and Salmonella spp. were isolated respectively in 5 (2.5%) and 3 samples (1.5%). Enteropathogenic E. coli was isolated in 10.8% (4/37) of the samples tested.The multiplex real-time PCR identified bacteria in 20 patients, including 17 cases of Shigella spp., 1 case of Salmonella spp. and 2 cases of Campylobacter spp.Conclusions: This study has highlighted the low frequency of 3 sought bacterial genera in stool samples. It has also demonstrated a significant difference between the culture and the multiplex Real-Time PCR method in the diagnosis of Shigella.

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Manandhar, Ruchee, Bijendra Raj Raghubanshi, Moni Mahato, Sweekrity Neupane et Rajni Lama. « Bacteriological Profile and Antimicrobial Susceptibility Patterns of Urine Culture Isolates from Patients in a Tertiary Care Centre in Lalitpur ». Birat Journal of Health Sciences 5, n^o 1 (26 juin 2020) : 881–85. http://dx.doi.org/10.3126/bjhs.v5i1.29602.

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Introduction: Urinary tract infection (UTI) is a microbial infection of the urinary system involving the urinary tract anywhere from kidney to urethra. It is one of the most common bacterial infections affecting men and women in developing countries with a high rate of morbidity and financial cost. Objectives: The objective of our study is to study the prevalence of UTI in patients attending KIST Medical College & Teaching Hospital (KISTMCTH), and determine the antimicrobial susceptibility pattern of bacteria thus isolated. Methodology: A total of 3742 urine samples from patients suspected of urinary tract infections presenting with the history and symptoms suggestive of urinary tract infection, attending various departments of KISTMCTH from April 2017 to April 2018 were studied. Isolates were identified by standard microbiological methods and tested for in vitro antibiotic susceptibility by modified Kirby-Bauer disc diffusion method. Results: Pathogenic bacteria were isolated from 646 out of 3742 urine samples (17.26%). Escherichia coli was the most common bacteria isolated (67.02%) followed by Klebsiella pneumoniae (14.5%). Other bacteria isolated were Enterococcus spp, Pseudomonas aeurigenosa, Klebsiella oxytoca, Proteus mirabilis, Satphylococcus aureus, Coagulase negative staphylococcus spp, Proteus vulgaris, Acinetobacter spp, Citrobacter freundii, Citrobacter diversus and Enterobacter spp. The isolated pathogenic bacterias were most resistant to Ampicillin (46.43%) and least resistant to Imipenem (6.03%). However, the first line antibiotic the bacterias were least resistant to was cefotaxime (7.12%). Conclusions: Marked resistance has been observed with commonly prescribed antibiotics like Ciprofloxacin and Norfloxacin. Therefore, studies should be conducted routinely to identify the common bacteria causing UTI and formulate appropriate antibiotic policy.

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Chikh, G., J. Pourquié, P. Kaiser et A. M. Davila. « Characterization of the bacterial flora isolated from a pilot-scale lagoon processing swine manure ». Canadian Journal of Microbiology 43, n^o 11 (1 novembre 1997) : 1079–83. http://dx.doi.org/10.1139/m97-154.

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The bacterial flora of an experimental plant that processes liquid swine manure by an aerated compartmented (multistage) lagoon system has been studied. The total flora is characterized by a larger number of oligotrophic bacteria than eutrophic ones. Each compartment displays a specific flora, different from the flora in the manure, and consisting of a complex assembly of Gram-negative and Gram-positive ubiquitous species, such as Aeromonas spp. and Pseudomonas spp., and specialized species, such as Sphingobacterium spp. and Corynebacterium spp. The fecal indicator microorganisms have been shown to disappear in the course of the processing. A significant population of nitrifying bacteria has been observed at levels up to 104 bacteria∙mL−1.Key words: swine manure, processing lagoon, bacterial flora, wastewater.

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Özdemir, Burcu, İpek Mumcuoğlu, Esragül Akıncı, İlkem Acar Kaya, Ahmet Sertçelik et Hürrem Bodur. « Anaerop İnfeksiyon Saptanan Vakaların Klinik Özellikleri, Etkenlerin Tür Düzeyinde Dağılımı ve Anaerop Bakteremilerde Fatalite ». Flora the Journal of Infectious Diseases and Clinical Microbiology 25, n^o 4 (30 décembre 2020) : 506–15. http://dx.doi.org/10.5578/flora.69469.

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Introduction: This study aimed to determine the distribution of anaerobic bacteria species, which are the causative agents of infection, in order to investigate the epidemiological and clinical characteristics of the cases and evaluate fatality in cases with an aerobic bacteremia. Materials and Methods: One hundred and twenty-five cases who were determined with 148 isolates of anaerobic bacteria were included into this study at Ankara Numune Training and Research Hospital Medical Microbiology Laboratory between January 2014-February 2018. The specimens requested to undergo anaerobic evaluation and transported to the laboratory under anaerobic suitable conditions were prepared with Gram staining and inoculated in the Schaedler agar. After appropriate incubation, the identification of isolated anaerobic bacteria at the level of species was performed by using matrix-assisted laser desorption time-of-flight (MALDI-TOF MS). Results: Of the 125 cases who had an anaerobic infection, 60% were males, and mean age was 52.69 ± 18.5 years. Intra-abdominal and skin and soft tissue infections were the most common source of infection. One hundred and twenty-eight clinical specimens (78 abscesses, 50 blood cultures) which were sent from cases were identified with 148 anaerobic bacteria species. We detected the most common isolated species as Bacteriodes spp., Actinomyces spp. and Clostridium spp., respectively. The most common anaerobic bacteria species isolated from blood cultures of 50 cases with anaerobic bacteremia were Bacteroides spp., Clostridium spp., and intra-abdominal infection was the most common source for anaerobic bacteremia. Fusobacterium nucleatum (5/6; 83.3%) was the most frequent species in Fusobacterium bacteremia. F. nucleatum bacteremia was detected in an older population and was often associated with underlying malignancy. F. necrophorum bacteremia occurred in a younger population without underlying comorbidities and was diagnosed as Lemierre’s syndrome. Fatality rate was 51% in anaerobic bacteremia. Fatality was significantly higher in patients who were followed up in the intensive care unit and had high Charlson index (p< 0.05). Conclusion: MALDI-TOF MS has become an important method for the identification of anaerobic bacteria with its reliable results in a very short time. The most common anaerobic microorganism was Bacteroides spp., and the two most frequent sources of infection were intraabdominal and skin and soft tissue infections. We observed that most of the cases with F. nucleatum bacteremia had malignancy and an older population. The case with F. necrophorum bacteremia was young and had no underlying comorbidities. In this study, fatality rate (51%) was detected high in anaerobic bacteremia. Therefore, the routine use of anaerobic blood culture bottles is important for the identification and for the effective treatment of cases with anaerobic bacteremia.

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Einarsson, Gisli G., Jiangchao Zhao, John J. LiPuma, Damian G. Downey, Michael M. Tunney et J. Stuart Elborn. « Community analysis and co-occurrence patterns in airway microbial communities during health and disease ». ERJ Open Research 5, n^o 3 (juillet 2019) : 00128–2017. http://dx.doi.org/10.1183/23120541.00128-2017.

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Ecological relationships between bacteria are important when considering variation in bacterial communities in humans, with such variation playing an important role in both health and disease.Using high-throughput sequence data of the 16S rRNA marker-gene, we analysed the prevalence of taxa in the airways of a number of health- and disease-associated cohorts and determined the main drivers of community variance and bacterial co-occurrence.A number of facultative and obligately anaerobic bacterial taxa are commonly associated with the upper airways, forming the main “core” microbiota, e.g. Streptococcus spp., Veillonella spp., Prevotella spp., Granulicatella spp. and Fusobacterium spp. Opportunistic pathogenic bacteria associated with chronic airways disease, such as Pseudomonas spp. (Pseudomonas aeruginosa), Burkholderia spp. (Burkholderia cepacia complex) and Haemophilus spp. (Haemophilus influenzae) demonstrated poor correlation with other members of their respective communities (ρ<0.5; p>0.005), indicating probable independent acquisition and colonisation. Furthermore, our findings suggest that intra-genus variation between health and disease may affect community assemblies.Improved understanding of how bacteria assemble in time and space during health and disease will enable the future development of tailored treatment according to the patient's own signature microbiota, potentially providing benefit to patients suffering from airway diseases characterised by chronic infection.

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Akter, Aklima, Sadia Ahmed, Tamanna Islam et Saurab Kishore Munshi. « Occurrence of drug resistant bacteria in household waste samples ». Stamford Journal of Microbiology 9, n^o 1 (27 février 2020) : 15–18. http://dx.doi.org/10.3329/sjm.v9i1.45652.

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Current study was carried out to investigate the presence of drug resistant bacterial isolates in the biodegradable household waste samples. In this respect, a total of six domestic waste samples including three kitchen waste samples and one sample each of home dust, dustbin waste and liquid waste were collected. Samples were analyzed for quantification of bacterial load and along with their drug susceptibility pattern. Huge array of total viable bacteria was present in all the samples (in average of 108 cfu/g or ml). Among the specific bacteria, Bacillus spp. was predominant and Vibrio spp. was found in almost all samples except liquid waste. Presence of Staphylococcus spp., E. coli, Klebsiella spp., Pseudomonas spp., Salmonella spp. and fecal coliform were evident in some samples. All isolates were found to be multidrug resistant. Notably, 100% resistance was documented against cefuroxime and amoxicillin. All the isolates showed sensitivity against meropenem, amikacin and ceftriaxone. Presence of drug resistant bacteria in household waste samples in present study critically raises the requirement for proper management and disposal of the accumulated domestic wastes by the municipal and government authorities. Stamford Journal of Microbiology, Vol.9(1) 2019: 15-18

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Bouamamaa, Lamiaa, Antonio Sorlozano, Amin Laglaoui, Mariam Lebbadi, Ahmed Aarab et José Gutierrez. « Antibiotic resistance patterns of bacterial strains isolated from Periplaneta americana and Musca domestica in Tangier, Morocco ». Journal of Infection in Developing Countries 4, n^o 04 (10 février 2010) : 194–201. http://dx.doi.org/10.3855/jidc.336.

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Background: Flies and cockroaches are two insects in close contact with human beings. They are carriers of human pathogenic bacteria on the external areas of their bodies or in their digestive tracts. This study examines Periplaneta americana and Musca domestica collected from the residential areas of six districts in Tangier, Morocco. Methodology: In total, 251 bacteria were isolated from external areas of the participants' bodies and the antimicrobial susceptibility was calculated. Results: The predominant bacterial species included Escherichia coli (17.9%), Klebsiella spp. (14.7%), Providencia spp. (9.6%), Staphylococcus spp. (15.1%) and Enterococcus spp. (11.6%). The study showed no difference between the species of bacterial strains from American cockroaches and houseflies. Carbapenems and aminoglycosides were active against 100% of the Gram-negative bacilli isolated in this study. Staphylococcus spp. strains were susceptible to linezolid, vancomycin, daptomycin, levofloxacin and cotrimoxazole, and no antibiotic resistance was found in Enterococcus spp. Conclusions: In our setting, although both cockroaches and flies collected from residential areas may be vectors of human pathogenic bacteria, the infections caused by them are easily treatable as a result of the high susceptibility of their bacteria to antibiotics routinely used in the community or in hospitals.

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Hariharan, Harry, Jane MacDonald, Barrie Carnat, James Bryenton et Susan Heaney. « An Investigation of Bacterial Causes of Arthritis in Slaughter Hogs ». Journal of Veterinary Diagnostic Investigation 4, n^o 1 (janvier 1992) : 28–30. http://dx.doi.org/10.1177/104063879200400107.

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Joints from 153 arthritic and 80 normal slaughter hogs were examined by culture for presence of bacteria. Although none of the normal joints yielded bacteria, 37% of the disease joints were positive for bacterial growth. Of 67 bacterial isolates obtained, 45% were Erysipelothrix rhusiopathiae. Occurrence of other bacteria in order of their frequency was Streptococcus suis (16%), Actinomyces pyogenes (10%), Mycoplasma spp. including 3 M. hyorhinis isolates (7%), staphylococci (7%), Streptococcus spp. (6%), and organisms of uncertain significance ( 7%).

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Rodrigues, Maria Elisa, Fernanda Gomes et Célia F. Rodrigues. « Candida spp./Bacteria Mixed Biofilms ». Journal of Fungi 6, n^o 1 (20 décembre 2019) : 5. http://dx.doi.org/10.3390/jof6010005.

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The ability to form biofilms is a common feature of microorganisms, such as bacteria or fungi. These consortiums can colonize a variety of surfaces, such as host tissues, dentures, and catheters, resulting in infections highly resistant to drugs, when compared with their planktonic counterparts. This refractory effect is particularly critical in polymicrobial biofilms involving both fungi and bacteria. This review emphasizes Candida spp.-bacteria biofilms, the epidemiology of this community, the challenges in the eradication of such biofilms, and the most relevant treatments.

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PHILANDER, MICHAEL, PAULETTE RAGOBEER et RUTH DANIEL. « Short communication : A comparison of the rate of polyethylene decomposition among Bacillus spp., Pseudomonas spp., and Escherichia coli bacteria ». Nusantara Bioscience 11, n^o 1 (11 avril 2019) : 97–100. http://dx.doi.org/10.13057/nusbiosci/n110116.

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Abstract. Philander M, Ragobeer P, Daniel R. 2019. Short communication: A comparison of the rate of polyethylene decomposition among Bacillus spp., Pseudomonas spp., and Escherichia coli bacteria. Nusantara Bioscience 11: 97-100. This study did a comparative analysis of the rate of polythene plastic decomposition among three species of bacteria namely, Bacillus spp., Pseudomonas spp., and Escherichia coli. The three bacterial species were cultured and grown in 2-liter polyethylene terephthalate bottles with nutrient broth separately in triplicates along with a control that did not include any bacteria. These bottles were left undisturbed at room temperature for three months (92 days) after which the containers were subjected to sterilization. Plastic weights were taken using an electronic scale and compared with original values. From the results, it showed that in the three months there was a relatively large amount of degradation that occurred. Bacillus spp. and E.coli bacteria yielded similar results and moved at a rate faster than the Pseudomonas spp., A daily rate for each bacterial species was calculated and a predictive figure based on rates was made. If the rates remained constant there would be total degradation of the polyethylene plastics by the Bacillus spp., E. coli and Pseudomonas spp., in 11.45, 11.45 and 12.35 years respectively. This is a significant finding since in nature plastics can take hundreds of years to decompose.

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Moote, Paul E., Sarah J. M. Zaytsoff, Rodrigo Ortega Polo, D. Wade Abbott, Richard R. E. Uwiera et G. Douglas Inglis. « Application of culturomics to characterize diverse anaerobic bacteria from the gastrointestinal tract of broiler chickens in relation to environmental reservoirs ». Canadian Journal of Microbiology 66, n^o 4 (avril 2020) : 288–302. http://dx.doi.org/10.1139/cjm-2019-0469.

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Characterization of the microbiota of chickens is of current interest. The goals of the current study were to apply anaerobic isolation methods to comprehensively isolate and identify bacteria from the gastrointestinal tract of chickens and their environment. Bacterial communities within the drinking water were dominated by Escherichia, whereas communities in litter were more representative of the cecum. The crop and small intestine (jejunum and ileum) were dominated by Lactobacillus and Enterococcus spp., and the cecum was dominated by Proteus spp. The collection of bacteria isolated was dominated by Enterococcus spp., Escherichia/Shigella spp., Lactobacillus spp., and Proteus spp.; however, many rare taxa were observed. These included members of the Clostridiales and Clostridium spp., which were commonly isolated from the ileum and cecum. Bacteria isolated by enrichment and direct plating differed. The selective de Man–Rogosa–Sharpe agar was commonly associated with the isolation of Lactobacillus spp. and yielded the lowest diversity of all methods utilized. Increased diversity and frequency of Clostridium spp. was observed in enrichments of blood and mucus or by plating on Columbia agar supplemented with 10% blood and gentamicin. The bacteria isolated from this study provide source material for genomic and functional studies in chicken hosts.

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Alothaim, Raya, Ahmad Almatroudi, Monir Uddin Ahmed, Masood Alam Khan, Rejo Jacob Joseph, Abdullah Alharbi, Mohammed Alkathlan et Khaled S. Allemailem. « Public Health Risk Assessment of the Door Handles of the Community Pharmacies in Qassim Region, Saudi Arabia ». Journal of Pure and Applied Microbiology 14, n^o 4 (18 novembre 2020) : 2649–54. http://dx.doi.org/10.22207/jpam.14.4.41.

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Door handles are being reported to harbor a diverse group of microorganisms, mainly bacteria. Presence of pathogenic and antibiotic-resistant bacteria in the door handles carry risk to the health of the public. For this reason, a study was carried in the Qassim region of Saudi Arabia by isolating bacteria from the pharmacy door handles from four different areas. Total 100 samples were collected by wiping the door handles with a sterile cotton swab soaked in sterile water. Microorganisms were isolated using Blood agar and MacConkey agar and identified following standard microbiological procedure. Siemens MicroScan Walkaway system was used for determination of antibiotic susceptibility pattern. In total, 301 bacteria from 13 bacterial species were isolated and identified. The predominant bacterial species include Staphylococcus spp. 56.48% followed by Bacillus spp. 12.29% and Micrococcus spp. 10.30%. Gram-negative bacteria like Shigella sonnei and Salmonella paratyphiA were also isolated. Being the most predominant species, Antibiotic resistance pattern of 39 Staphylococcus spp. were determined. 38.46% of the Staphylococcus spp. were found to be resistant to Cefoxitin, and 30.76% were beta-lactamase producing. The results also indicated that about one -third of Staphylococcus spp. were methicillin resistant. The door handles of pharmacies in the Qassim region carry risk to the health of the public. Proper hygienic measures are recommended for the public health safety until doors are made automatic and touch-free.

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Chhanda, Mousumi Sarker, Imran Parvez, Nazmi Ara Rumi, Md Hafiz All Hosen et Md Rezaul Islam. « Identification of pathogenic bacteria from infected Thai koi (Anabas testudineus) ». Asian Journal of Medical and Biological Research 5, n^o 1 (22 avril 2019) : 56–62. http://dx.doi.org/10.3329/ajmbr.v5i1.41046.

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A study was conducted for identification of pathogenic bacteria from Thai koi (Anabas testudineus) and an experimental infection test was run for identifying the actual causative agent of the infection. Due to perform the experiment, the fish sample was collected from different fish farm located in Fulbari, Dinajpur to the Microbiology lab of the HSTU-Dnajpur campus and placed in tray for taking sample from different infected part such as gill, slime, muscle, fin of the fish by using wire loop then these were taking in the nutrient ager medium for observing the culture of bacteria. After then specific culture media, Salmonella-Shigella media, Mannitol salt agar media, Mac-Conkey (MaC) agar media and Eosin Methylene Blue media were used for observing specific bacterial characteristics. Then biochemical tests, Methyl red (MR), Voges-proskaure test, Triple sugar iron test, Indole test were performed for bacterial identification. As a result Salmonella spp., Shigella spp., Klebshiella spp. and Staphylococcus spp. were confirmed. Catalase test and Simon citrate test was also performed. Then Grams staining method was followed for microscopic observation of identified bacteria. Then experimental infection test was performed in Aquaculture lab by setting up 5 aquarium holding fresh fish. The fresh water and identified bacteria were added specifically to the aquarium and it was continued for 15 days for observing infectious symptoms. After 15 days the fish with Salmonella spp. and Staphylococcus spp. were showed infectious symptoms but other did not any change in physical appearance. So it can be said that Staphylococcus spp. and Salmonella spp. are able to show ulcerative symptoms in Thai koi (Anabas testudineus) that is a bacterial infection. Asian J. Med. Biol. Res. March 2019, 5(1): 56-62

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Arias, Mônica V. Bahr, Flávia N. Padilha et Marcia R. E. Perugini. « Deep tissue culture and hemoculture in dogs with wounds and sepsis ». Pesquisa Veterinária Brasileira 37, n^o 12 (décembre 2017) : 1483–90. http://dx.doi.org/10.1590/s0100-736x2017001200020.

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ABSTRACT: Contaminated and infected wounds occur very frequently in veterinary medicine and can cause systemic inflammatory response syndrome, sepsis, and death. This study aimed to test the feasibility of collecting wound material by deep-tissue or punch biopsy for microbial culture, determine the frequency of bacteria in the wound(s) and blood cultures and the susceptibility of these microbes to antimicrobials, and evaluate clinical parameters that could be related to prognosis. Thirty dogs with wounds and signs of SIRS/sepsis were included in this study. Bacteria were isolated from all wounds and 41 bacterial isolates could be identified based on culture of the materials collected by punch biopsy; 53.66% of the isolates were gram-negative, mainly involving Pseudomonas aeruginosa, Klebsiella pneumoniae, and Enterococcus spp., and 46.34% were gram-positive bacteria such as Streptococcus spp., Enterococcus spp., and Staphylococcus spp. The survival rate was 66.67%. Based on blood culture analysis, we identified bacteremia in seven patients, predominantly of gram-negative bacteria, which negatively affected patient survival, as six dogs died. Hypoglycemia (≤60mg/dL) and severe hyperglycemia (≥180mg/dL) also negatively affected survival as 23.33% of the hypo/hyperglycemic dogs died. Factors such as blood lactate level at admission and hematocrit levels, and mean arterial pressure were not significantly correlated with death or survival of the dogs.

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Patkowska, E., et M. Konopiński. « Antagonistic bacteria in the soil after cover crops cultivation ». Plant, Soil and Environment 60, No. 2 (18 février 2014) : 69–73. http://dx.doi.org/10.17221/774/2013-pse.

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The purpose of the studies was to establish the quantitative composition of bacteria Bacillus spp. and Pseudomonas spp. and their antagonistic effect towards soil-borne fungi after the cultivation of oats, spring vetch and tansy phacelia as intercrop cover plants. The total population of bacteria in 1 g dry weight of the soil from the experimental combination where mulch of oats was used was larger than in the combination with spring vetch or tansy phacelia. Totally, approximately three times as much Bacillus spp. was obtained from soil samples as compared to Pseudomonas spp. Tests showed that the most isolates of antagonistic bacteria out of the enumerated genera occurred in the soil after oats cultivation, and the least in the soil after the cultivation of tansy phacelia. Antagonistic Bacillus spp. and Pseudomonas spp. inhibited the growth and development of Fusarium oxysporum, Haematonectria haematococca and Thanatephorus cucumeris in the most effective way. The greatest total antagonistic effect of Bacillus spp. and Pseudomonas spp. towards Altenaria alternata, F. culmorum, F. oxysporum, H. haematococca, P. irregulare and T. cucumeris was found out after managing the mulch of oats. The smallest total antagonistic effect of bacteria was observed after managing the mulch of tansy phacelia.

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Rota, Ada, Andrea Del Carro, Alessia Bertero, Angela Del Carro, Alessandro Starvaggi Cucuzza, Penelope Banchi et Michela Corrò. « Does Bacteria Colonization of Canine Newborns Start in the Uterus ? » Animals 11, n^o 5 (14 mai 2021) : 1415. http://dx.doi.org/10.3390/ani11051415.

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The assumption that requires the uterus to be a sterile environment to sustain a successful pregnancy has been recently challenged in humans, and is still under debate. The aim of this study was to assess whether bacteria can be isolated from the pregnant uterus and from amniotic fluid and meconium of healthy canine fetuses at term, delivered through cesarean section. Fifteen dams of different breed, age and parity, undergoing either elective (n = 10) or emergency (n = 5) cesarean section after a healthy pregnancy, were included in the study. Swabs for bacterial culture were collected from the uterus, and from amniotic fluid and meconium. Bacteria were isolated from all the sampled sites and materials, irrespective of cesarean type. In most cases, different bacteria were isolated from the different sites. Acinetobacter spp., coagulase-negative Staphylococci and Bacillus spp. were frequently found while Pseudomonas aeruginosa, Micrococcus spp., Moraxella spp., Macrococcus spp., Glutamicibacter spp., Stenotrophomonas spp. and Psychrobacter spp. were only occasionally identified. Our data show that uterus and fetuses may not be sterile in healthy term canine pregnancies.

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Ruvalcaba-Gómez, José M., Raúl J. Delgado-Macuil, Lily X. Zelaya-Molina, Otoniel Maya-Lucas, Edmundo Ruesga-Gutiérrez, Luis M. Anaya-Esparza, Zuamí Villagrán-de la Mora, David A. López-de la Mora et Ramón I. Arteaga-Garibay. « Bacterial Succession through the Artisanal Process and Seasonal Effects Defining Bacterial Communities of Raw-Milk Adobera Cheese Revealed by High Throughput DNA Sequencing ». Microorganisms 9, n^o 1 (23 décembre 2020) : 24. http://dx.doi.org/10.3390/microorganisms9010024.

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The bacterial community of the artisanal Adobera cheese from Los Altos de Jalisco was described through high-throughput sequencing of 16S rRNA gene libraries. Samples were collected in two different seasons (dry and rainy) during four key steps of the manufacturing process (raw milk, fresh curd, matured curd, and cheese). Bacterial diversity was higher in early steps in comparison with the final elaboration stages. Firmicutes and Proteobacteria were the most abundant phyla, strongly represented by the Streptococcaceae, Enterobacteriaceae and Lactobacillaceae families, and core bacteria genera such as Streptococcus spp., Lactococcus spp., and Lactobacillus spp. Undesirable bacteria, including Pseudomonas spp. and Acinetobacter spp., were also detected in raw milk but almost undetectable at the end of the cheese manufacturing process, and seemed to be displaced by lactic-acid bacteria-related genera. Seasonal effects were observed on the community structure but did not define the core microbiota composition. Predictive metabolism was related to membrane transport, and amino-acid, lipid, and carbohydrate metabolism pathways. Our results contribute to deduce the role of bacteria involved in Adobera cheese manufacturing in terms of the metabolism involved, cheese microbial safety, and how undesirable bacterial populations could be regulated by process standardization as a potential tool to improve safety.

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Afolabi, OR, AR Oloyede et TA Ibrahim. « Evaluation of Pathogenic Bacteria Associated with Fresh Produce obtained from Selected Markets in Abeokuta ». Journal of Science and Sustainable Development 4, n^o 1 (12 juin 2013) : 75–81. http://dx.doi.org/10.4314/jssd.v4i1.7.

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The bacterial quality of eight types of fresh produce obtained from selected markets in Abeokuta was determined. Two hundred forty (240) samples of fresh vegetables were examined for aerobic plate counts, coliform counts, and presence of Escherichia coli, toxigenic Staphylococcusaureus, Salmonella spp and Listeria spp. The aerobic plate counts ranged from 2.80 log10 cfu/g to 15.60 log10 cfu/g with the inner parts of cut- water melons having the highest value. Total coliform counts ranged from 0.0 to 11.80 log10 cfu/g. Pathogenic bacteria isolated were Escherichia coli,Staphylococcus aureus, Salmonella spp, Listeria spp, Shigella dysenteriae, Klebsiella pneumoniae, Enterobacter aerogenes, Bacillus spp, Pseudomonas aeruginosa and Streptococcus spp. These pathogens were mostly found at the outer leaves/ parts of the vegetables and render unsafe for human consumption. This study shows that the outer parts/ leaves of fresh produce are heavily contaminated with pathogenic bacteria and the fresh produce should be pre- treated thoroughly, so as to reduce the risk of food- borne outbreaks.Keywords · Pathogenic bacteria · Bacterial quality · Coliform counts

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Paliy, A. P., S. O. Gujvinska, L. P. Livoshchenko, L. I. Nalivayko, Ye M. Livoshchenko, V. I. Risovaniy, R. A. Dubin, N. V. Berezhna, A. P. Palii et R. V. Petrov. « Specific composition of indigenous microflora (Lactobacillus spp., Bifidobacterium spp., Lactococcus spp.) in farm animals ». Ukrainian Journal of Ecology 10, n^o 1 (22 janvier 2020) : 43–48. http://dx.doi.org/10.15421/2020_7.

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To maintain a stable composition of the gastrointestinal tract microflora in farm animals it is necessary to use probiotic agents to ensure the full functioning of the digestive, hormonal, and immune systems of the body. Most modern probiotics include lactic acid bacteria and bifidobacteria, which are the most physiologically valuable components of a healthy organism’s an indigenous microflora. The aim of this study was to provide indication and identification from the milk of healthy cows and gastric tract of healthy pigs and calves of the genus bacteria Lactobacillus, Bifidobacterium, and Lactococcus. The objects of research were cultures of microorganisms isolated from cows milk (82), the gastrointestinal tract of cattle (317), and piglets of different age groups (114). Bacteriological studies were carried out on the basis of the veterinary sanitation and parasitology laboratory of the National Scientific Center "Institute of Experimental and Clinical Veterinary Medicine" (Kharkiv) in accordance with current regulatory documents. According to the research of the gastrointestinal tract of clinically healthy calves and piglets isolated and typified to 317 and 114 cultures of microorganisms, the species composition of the microflora (82 bacterial cultures) of the cisternous and parenchymatous milk of clinically healthy cows was determined. A total of 513 isolates of microorganisms were isolated, including: Enterobacter spp. –2 (0,39%), Staphylococcus spp. – 7 (1,37%), Bacillus spp. – 11 (2,14%), Enterococcus spp. – 33 (6.43%), Lactococcus spp. – 75(14,62%), Bifidоbacterium spp. – 170 (33,14%), and Lactobacillus spp. – 215 (41,91%). In the study of the biological properties of isolated microorganisms Lactobacillus spp. (215) established their species identity: L. brevis – 7 (3.26%), L. delbrueckii – 9 (4,19%), L. acidophilus – 21 (9,77%), L. fermentum – 23 (10,69%), L. casei – 57 (26,51%), and L. plantarum – 98 (45.58%). Cultures of Bifidobacterium spp. (170) belong to B. suis – 2 (1,18%), B. breve – 7 (4,12%), B. lactentis – 15 (8,82%), B. bifidum – 21 (12,35%), B. longum – 22 (12,94%), B. infantis – 25 (14,71%), and B. adolescentis – 78 (45,88%). From samples of biological material of farm animals, 75 cultures of the genus Lactococcus spp. were isolated (75) of which Lactococcus lactis is representative. Isolated bacteria Lactobacillus spp., Bifidobacterium spp. and Lactococcus spp. promising when creating innovative probiotic products for farm animals.

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Boichenko, M. N., E. O. Kravtsova et V. V. Zverev. « Mechanism of intracellular bacterial parasitism ». Journal of microbiology, epidemiology and immunobiology, n^o 5 (21 novembre 2019) : 61–72. http://dx.doi.org/10.36233/0372-9311-2019-5-61-72.

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Algorithm of intracellular bacterial parasitism does not depend on if bacterium is obligate or facultative intracellular parasite. Depending on replicative niche’s localization intracellular bacterial parasites are divided onto cellular and vacuolated. Rickettsia spp., Shigella spp., Chlamydia spp. and Listeria monocytogenes use cell’s machinery of actin polymerization during process of their intracellular parasitism. These bacteria possess some of effector’s proteins which contain domains identical to effector proteins from the host cell. Shigella spp. T3SS and autotransporter protein IscA provide this process together with spreading bacteria intra colonic epithelium. In contrast other intracellular bacterial parasites, Listeria monocytogenes switches from dissemination in cytosol to persist in vacuole. In case of Brucella spp. the leading role in the creation of a replicative niche and in the modulation of the innate immune response is played by effector proteins of fourth type secretory system (T4SS).

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KALITA, MICHAŁ, MARTA PALUSIŃSKA-SZYSZ, ANNA TURSKA-SZEWCZUK, SYLWIA WDOWIAK-WRÓBEL et TERESA URBANIK-SYPNIEWSKA. « Isolation of Cultivable Microorganisms from Polish Notes and Coins ». Polish Journal of Microbiology 62, n^o 3 (2013) : 281–86. http://dx.doi.org/10.33073/pjm-2013-036.

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The potential role of currency in the spread of pathogenic microflora has been evaluated in many countries. In this study Polish paper notes and the coins in general circulation were assayed for the presence of cultivable bacteria and fungi. Bacterial isolates identification was based on cultural and biochemical characters and by comparison of the 16S rRNA gene sequence. Fungal isolates were recognized with biochemical and morphological criteria. Coagulase-negative staphylococci, (43.6% of the total bacterial count) including Staphylococcus saprophyticus, S. epidermidis, and S. hominis, and Enteroccus spp. (30.8% of the total bacterial count), i.e. E.faecalis, E.faecium and E. durans, were the most numerous bacterial contamination. Penicillium spp., and Aspergillus spp. were the most frequently detected moulds whereas Candida spp. was the most frequent yeast isolated from currency. A visible dependence between the banknote denomination, the physical condition of paper currency, and the number of bacteria and fungi was found. The overall count of bacteria isolated from currency was thousand-fold higher than that of fungal isolates. The total amount of bacteria and fungi recovered from the coins was approximately 2.7-fold lower than that isolated from the notes. In summary, the Polish currency notes were found to be contaminated mainly with commensal bacteria and fungi while the opportunistic pathogenic microorganisms Escherichia coli, Pseudomonas stutzeri and C. albicans were detected at a low frequency.

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Modak, Biswajit, Md Shahinur Rahman, Mohammad Shahid Gazi, Md Aftab Uddin et Tasmina Rahman. « Antimicrobial potency assay of common antibiotics collected from different drug stores in Dhaka Metropolis ». Stamford Journal of Microbiology 3, n^o 1 (26 mars 2015) : 26–29. http://dx.doi.org/10.3329/sjm.v3i1.22749.

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Antibiotic, known as the magic bullet, was developed to control the growth of pathogenic bacteria. Efficacy of an antibiotic depends on its target site on bacteria. The current public health issue is the emergence of resistant bacterial strains against these drugs. The present study was undertaken to perform the routine antibiotic susceptibility pattern of eight laboratory isolates (Escherichia coli, Bacillus spp., Staphylococcus spp., Vibrio spp., Salmonella spp., Pseudomonas spp., Klebsiella spp. and Listeria spp.) against eleven different categories of antibiotics (Ciprofloxacin, Cephradine, Metronidazole, Cefuroxime, Cefixime, Levofloxacin, Amoxicillin, Azithromycin, Doxycycline, Erythromycin and Flucloxacillin) available in local markets of Dhaka metropolis. Among these antibiotics, Azithromycin, Ciprofloxacin, Cefuroxime, Levofloxacin and Doxycycline showed the highest potency against these bacteria. On the contrary, Amoxicillin and Metronidazole showed almost no potency. Erythromycin, Cephradine and Flucloxacillin gave variable effectivity against the tested isolates. These findings reveal that measures for prevention and containment of antimicrobial resistance are necessary in Bangladesh. DOI: http://dx.doi.org/10.3329/sjm.v3i1.22749 Stamford Journal of Microbiology, Vol.3(1) 2013: 26-29

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Hussin, Nor Husna Mat, Lye Munn Sann, Mariana Nor Shamsudin et Zailina Hashim. « Characterization of Bacteria and Fungi Bioaerosol in the Indoor Air of selected Primary Schools in Malaysia ». Indoor and Built Environment 20, n^o 6 (6 septembre 2011) : 607–17. http://dx.doi.org/10.1177/1420326x11414318.

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This study reports the types and concentrations of bacterial and fungal bioaerosols found in five randomly selected primary schools in Malaysia. Normal flora bacteria was the most frequently isolated bacteria including Staphylococcus spp., Pseudomonas spp. and Bacillus spp. Terribacillus spp. found in this study had never been reported before. The most frequently isolated fungal genera were Aspergillus, Penicillium, Fusarium, Rhizopus and Zygomycetes. The average concentration of bacteria in indoor and outdoor air were 1025 ± 612 CFU/m3 and 1473 ± 1261 CFU/m3, respectively, while the average concentration of fungal bioaerosol in indoor and outdoor air were 292 ± 83 CFU/m3 and 401 ± 235 CFU/m3, respectively. The percentages of bacterial and fungal samples that were within the American Conference of Industrial Hygenists (ACGIH) recommended levels were 44% and 33.8%, respectively. The ratio of indoor to outdoor fungi concentration was below 1.0, suggesting minimal indoor generative source for fungal bioaerosols. However, the ratio of indoor to outdoor bacteria concentration was approaching 1.0, suggesting the presence of potential internal generative source and inadequate ventilation. Building occupants might be one of the potential sources of bacteria in the indoor air as the bacteria concentrations without occupants were significantly lower than with occupants (p < 0.05).

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Cottrell, Matthew T., Antonio Mannino et David L. Kirchman. « Aerobic Anoxygenic Phototrophic Bacteria in the Mid-Atlantic Bight and the North Pacific Gyre ». Applied and Environmental Microbiology 72, n^o 1 (janvier 2006) : 557–64. http://dx.doi.org/10.1128/aem.72.1.557-564.2006.

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ABSTRACT The abundance of aerobic anoxygenic phototrophic (AAP) bacteria, cyanobacteria, and heterotrophs was examined in the Mid-Atlantic Bight and the central North Pacific Gyre using infrared fluorescence microscopy coupled with image analysis and flow cytometry. AAP bacteria comprised 5% to 16% of total prokaryotes in the Atlantic Ocean but only 5% or less in the Pacific Ocean. In the Atlantic, AAP bacterial abundance was as much as 2-fold higher than that of Prochlorococcus spp. and 10-fold higher than that of Synechococcus spp. In contrast, Prochlorococcus spp. outnumbered AAP bacteria 5- to 50-fold in the Pacific. In both oceans, subsurface abundance maxima occurred within the photic zone, and AAP bacteria were least abundant below the 1% light depth. The abundance of AAP bacteria rivaled some groups of strictly heterotrophic bacteria and was often higher than the abundance of known AAP bacterial genera (Erythrobacter and Roseobacter spp.). Concentrations of bacteriochlorophyll a (BChl a) were low (∼1%) compared to those of chlorophyll a in the North Atlantic. Although the BChl a content of AAP bacteria per cell was typically 20- to 250-fold lower than the divinyl-chlorophyll a content of Prochlorococcus, the pigment content of AAP bacteria approached that of Prochlorococcus in shelf break water. Our results suggest that AAP bacteria can be quite abundant in some oceanic regimes and that their distribution in the water column is consistent with phototrophy.

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Bakker, Peter A. H. M., Corné M. J. Pieterse et L. C. van Loon. « Induced Systemic Resistance by Fluorescent Pseudomonas spp. » Phytopathology® 97, n^o 2 (février 2007) : 239–43. http://dx.doi.org/10.1094/phyto-97-2-0239.

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Fluorescent Pseudomonas spp. have been studied for decades for their plant growth-promoting effects through effective suppression of soilborne plant diseases. The modes of action that play a role in disease suppression by these bacteria include siderophore-mediated competition for iron, antibiosis, production of lytic enzymes, and induced systemic resistance (ISR). The involvement of ISR is typically studied in systems in which the Pseudomonas bacteria and the pathogen are inoculated and remain spatially separated on the plant, e.g., the bacteria on the root and the pathogen on the leaf, or by use of split root systems. Since no direct interactions are possible between the two populations, suppression of disease development has to be plant-mediated. In this review, bacterial traits involved in Pseudomonas-mediated ISR will be discussed.

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Sharmin, Marufa, Kamal Kanta Das et Mrityunjoy Acharjee. « Estimation of microbiological propagation and antimicrobial traits of the frequently accessible flowers ». Stamford Journal of Microbiology 4, n^o 1 (27 mars 2015) : 19–23. http://dx.doi.org/10.3329/sjm.v4i1.22756.

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Present study portrayed a complete microbiological profile of commonly available flowers including Rosa kordesii, Gladiolus hybrid, Acmella oleracea, Nyctanthes arbortristis and Pseudomussaenda flava which were randomly collected from Dhaka city, Bangladesh. The microbial contamination was quantified up to 108 cfu/g. Exploration of specific pathogenic bacteria was estimated within the range of 103 to 108 cfu/g of which Pseudomonas spp. was found in G. hybrid, A. oleracea and P. flava (~106 cfu/g), whereas Escherichia coli and Staphylococcal contamination was evident in almost all samples up to 108 cfu/g. The in vitro antimicrobial activities of the flower extracts were notable against most of the test bacteria. The ethanolic extracts of R. kordesii showed anti-bacterial activity against most of the bacteria except E. coli and Salmonella spp. G. hybrid extracts showed activity against Klebsiella spp. and Bacillus spp., A. oleracea against E. coli, Pseudomonas spp., Bacillus spp., Klebsiella spp., Staphylococcus spp. and Salmonella spp., P. flava against Pseudomonas spp. and Bacillus spp., and N. arbortristis against Bacillus spp. The methanol extracts of G. hybrid possessed activity against E. coli, Listeria spp. and Pseudomonas spp., N. arbortristis extracts against E. coli, Vibrio spp., Bacillus spp., Klebsiella spp. and Staphylococcus spp., P. flava extracts against E. coli. DOI: http://dx.doi.org/10.3329/sjm.v4i1.22756 Stamford Journal of Microbiology, Vol.4(1) 2014: 19-23

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Morakinyo, Oyewale, Matlou Mokgobu, Murembiwa Mukhola et Tshifhiwa Godobedzha. « Biological Composition of Respirable Particulate Matter in an Industrial Vicinity in South Africa ». International Journal of Environmental Research and Public Health 16, n^o 4 (21 février 2019) : 629. http://dx.doi.org/10.3390/ijerph16040629.

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There is a growing concern that exposure to particulate matter of aerodynamic diameter of less than 2.5 µm (PM2.5) with biological composition (bioaerosols) may play a key role in the prevalence of adverse health outcomes in humans. This study determined the bacterial and fungal concentrations in PM2.5 and their inhalation health risks in an industrial vicinity in South Africa. Samples of PM2.5 collected on a 47-mm glass fiber filter during winter and summer months were analysed for bacterial and fungal content using standard methods. The health risks from inhalation of bioaerosols were done by estimating the age-specific dose rate. The concentration of bacteria (168–378 CFU/m3) was higher than fungi (58–155 CFU/m3). Bacterial and fungal concentrations in PM2.5 were lower in winter than in the summer season. Bacteria identified in summer were similar to those identified in winter: Staphylococcus sp., Bacillus sp., Micrococcus sp., Flavobacterium sp., Klebsiella sp. and Pseudomonas sp. Moreover, the fungal floras identified include Cladosporium spp., Aspergillus spp., Penicillium spp., Fusarium spp. and Alternaria spp. Children inhaled a higher dose of bacterial and fungal aerosols than adults. Bacteria and fungi are part of the bioaerosol components of PM2.5. Bioaerosol exposure may present additional health risks for children.

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Masse, Merveille Tamema, Romuald Jacques Samba Aloys et Brunelle Tchakounte Betbui. « Profile of Antibiotic Resistant Bacteria Isolated from Slaughterhouse Effluents of Etoudi-Yaounde and Its Receiving Waterbody ». International Journal of Health Sciences and Research 11, n^o 4 (5 avril 2021) : 40–47. http://dx.doi.org/10.52403/ijhsr.20210405.

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The Profile of antibiotic resistant bacteria isolated from slaughterhouse effluents of Etoudi-Yaounde, and its receiving waterbody (River Ako’o) were investigated. Wastewater samples were collected from abattoir outlet and along the river (pond, mid river and out-river). Resistance to amoxicillin, tetracycline, ciprofloxacin, sulfamethoxazole / trimethoprim, cefixime and kanamycin were determined. Resistance to amoxicillin was the highest (96.3 %), followed by sulfamethoxazole / trimethoprim (85.1%), kanamycin (81.5 %), cefixime (81.3 %), tetracycline (80.9 %) and ciprofloxacin (73.6 %). Bacterial resistance was higher in October, compared to March and December. Higher resistance ratios were observed downstream at out-river (77.9 %). Enterobacteria constituted 80% of the isolates. Escherichia coli, Salmonella spp., Klebsiella spp., Shigella spp., Staphylococcus spp. and Streptococcus spp. were the identified drug resistant bacteria, Escherichia coli was more prevalent (30.7%). All isolates were multi-resistant antibiotic resistant bacteria and some presented resistance to third generation cephalosporin. Wastewater from Etoudi-abattoir is a serious vector of the spread of bacterial drug resistance, thus, strategies towards hygiene and sanitation of the slaughterhouse and its effluents should be implemented. Key words: Antibiotic resistance, slaughterhouse wastewater, public health.

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Mahlangu, Precious, Naomi Maina et John Kagira. « Prevalence, Risk Factors, and Antibiogram of Bacteria Isolated from Milk of Goats with Subclinical Mastitis in Thika East Subcounty, Kenya ». Journal of Veterinary Medicine 2018 (11 novembre 2018) : 1–8. http://dx.doi.org/10.1155/2018/3801479.

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A cross-sectional study was carried out to determine the prevalence and risk factors of subclinical mastitis in dairy goats in Thika East Subcounty, Kenya. Further the bacterial pathogens and their antibiogram were investigated. Farm level data on risk factors were obtained from 41 farmers using questionnaires. Milk was obtained from 110 lactating dairy goats and tested for submastitis using California Mastitis Test (CMT). The prevalence of subclinical mastitis at goat level was estimated to be at 50.9% using CMT, out of which 86.5% yielded bacteria on culture. The significant risk factors associated with the occurrence of subclinical mastitis were cleaning schedule (p=0.022, OD=1.047) and parity of the goat (p=0048, OD=1.37). Higher prevalence of subclinical mastitis was observed for goats residing in houses cleaned at least once a fortnight. Does in the first parity were least affected. 169 bacterial isolates were obtained from culture, of which 52 isolates from major classes of isolated bacteria were tested for antibiotic sensitivity to six antibiotics. Fourteen different bacteria were isolated and identified from the milk samples. Coagulase-negative Staphylococci (20.7%), Serratia spp. (19.5%), Citrobacter spp. (16%), Klebsiella spp. (11%), Staphylococcus aureus (10.7%), Enterobacter spp. (6.5%), Escherichia coli (5.9%), Proteus spp. (3%), Corynebacterium spp. (1.8%), Morganella spp. (1.8%), Streptococcus spp. (1.2%), Providencia spp. (0.6%), Micrococcus spp. (0.6%), and Staphylococcus intermedius (0.6%) were isolated and identified from the samples. All the isolates were resistant to Penicillin G, while 98% of the isolates were sensitive to Streptomycin. In conclusion, the study showed that a large proportion of goats were affected by subclinical mastitis, with the main bacteria being Staphylococci spp. and coliforms, and that most of the tested antibiotics can be used in the treatment of mastitis. Farmers need to be trained on improved control of mastitis through adoption of good dairy husbandry and milking practices.

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Karoki, W. H., D. N. Karanja, L. C. Bebora et L. W. Njagi. « Isolation, Characterization, and Quantification of Bacteria from African Sausages Sold in Nairobi County, Kenya ». International Journal of Food Science 2018 (23 octobre 2018) : 1–9. http://dx.doi.org/10.1155/2018/3861265.

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African sausages are local popular delicacies in Kenya. Demand for these sausages has resulted in this delicacy’s vendors being on the increase. However, health risk posed to unsuspecting consumers of African sausages sold in informal, unhygienic make shift road-side kiosks in major cities of Kenya is largely unknown. A descriptive study was designed to isolate, characterize and quantify bacteria from African sausages sold in Nairobi County. A total of hundred (100) African sausages (62 roasted and 38 nonroasted) were conveniently collected from three meat eatery points of Westlands, Kangemi slum, and Pangani estates. Five genera of bacteria, namely, Staphylococcus spp. at 50.4%, Bacillus spp. at 19.5%, Streptococcus spp. 9.8%, Proteus spp. 2.4%, and E. coli spp. at 1.6%, were isolated from 80 African sausage samples. The total aerobic bacterial count range was between 1.0-9.9x101 and 1.0-9.9x107 log cfu/g with 37 samples having total aerobic bacterial count of between 1.0-9.9 x104 and 1.0-9.9 x107 log cfu/g. There was no significant difference (p>0.05) in distribution of isolates and total aerobic bacterial count across geographical sites studied among the roasted and nonroasted African sausages. This study has demonstrated presence of bacteria in African sausages which are potentially zoonotic to humans. Comprehensive study is needed to sample more eatery meat points in Nairobi and other areas in order to demonstrate pathogenic attributes of these isolates and establish the respective total aerobic bacterial count. There is also need to establish the sources of bacteria due to high total aerobic bacterial count determined in the current study.

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Elżbieta, Patkowska. « Antagonistic bacteria in the soil after Daucus carota L. cultivation ». Plant, Soil and Environment 64, No. 3 (21 mars 2018) : 120–25. http://dx.doi.org/10.17221/42/2018-pse.

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The studies determined the effect of bacteria Bacillus spp. and Pseudomonas spp. isolated from the soil after carrot cultivation on pathogenic fungi Altenaria dauci, A. radicina, Fusarium oxysporum, F. solani, Rhizoctonia solani and Sclerotinia sclerotiorum. A field experiment on carrot cultivation considered different intercrop plants (rye, buckwheat, white mustard, sunflower). Rye and buckwheat were the most conducive to the growth of Bacillus spp. and Pseudomonas spp. Those bacteria were the most effective in inhibiting the growth of F. solani, F. oxysporum and R. solani. The antagonistic effect of soil-borne Bacillus spp. and Pseudomonas spp. towards the tested fungi was the largest after the application of rye and white mustard as intercrop plants in the cultivation of carrot. Buckwheat and sunflower showed a slightly smaller influence on the antagonistic activity of the studied bacteria. Bacillus ssp. had a significantly lesser antagonistic effect than Pseudomonas ssp.

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Pervin, Mst Khashruba, Sanya Tahmina Jhora, Shikha Paul et Akhtarun Naher. « Antibiotic sensitivity pattern of diarrhoeal pathogens in under five children ». Bangladesh Medical Journal Khulna 52, n^o 1-2 (26 mars 2020) : 35–39. http://dx.doi.org/10.3329/bmjk.v52i1-2.46148.

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Background: Different bacterial enteropathogens are responsible for diarrhoea in children less than 5 years of age in Bangladesh. This study aimed to determine the antimicrobial sensitivity pattern of diarrhoeal pathogens that is necessary to know for the specific management of acute bacterial diarrhoea. Objectives: To find out the bacterial enteropathogens causing diarrhoea and their antimicrobial sensitivity pattern in under 5 children. Methodology: This was an observational cross sectional study carried out at Microbiology Department of Sir Salimullah Medical College, Dhaka. A total of 217 diarrhoeal patients 0-5 years age, attending Pediatric unit of Sir Salimullah Medical College and Mitford Hospital. Dhaka and Dhaka Shishu Hospital, Dhaka during the period of July, 2015 to June, 2016, were enrolled in the study. For isolation of the common enteric bacteria, diarrhoeal stools were cultured on MacConkey agar media and for Campylobacter spp, diarrhoeal stools were cultured on selective Modified Campy BAP media and nonselective Blood agar media with membrane filter. Positive culture was confirmed by Gram stain morphology and standard biochemical tests. Antimicrobial susceptibility test were used to identify the bacterial sensitivity pattern in the isolates. Results: Out of 217 diarrhoeal stools, bacteria was isolated from 97 (44.70%) patients by culture. Among 97 culture positive cases Eschericha coli (51- 52.58%), Campylobacter spp. (23-23.71%), Shigella spp. (15-15.46%) and Salmonella spp. (8-8.25%) were isolated. Mecillinam is the most sensitive drug for Escherichia coli, Campylobacter spp., Shigella spp. and Salmonella spp. Among the other antimicrobials, Campylabacter spp. were sensitive to azithromycin, erythromycin and nitrofurantoin. Escherichia coli were sensitive to nitrofurantoin, gentamicin and azithromycin. Shigella spp. were sensitive to ceftriaxone, ciprofloxacin and nitrofurantoin and Salmonella spp. were sensitive to ceftriaxone, cotrimoxazole and gentamicin. Conclusion: Mecillinam and nitrofurantoin were highly effective against bacteria causing diarrhoea in children. Bang Med J (Khulna) 2019; 52 : 35-39

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Handool, H. H. H. « Isolation and identification of some genera and species of bacteria and fungi from conjunctiva in cattle in Al-Diwaniya city ». Al-Qadisiyah Journal of Veterinary Medicine Sciences 12, n^o 2 (30 décembre 2013) : 55. http://dx.doi.org/10.29079/vol12iss2art258.

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This study was designed to identify some genera and species of bacteria and fungi that infect conjunctiva in cattle, as the studies on this subject are few somewhat, especially those that include isolating fungi that infect the conjunctiva as rare cases and that may be caused by low body immunity after topical corticosteroid and antibacterial therapy to an inflamed eye, This study included examination of (100) eye swabs, from cows from different ages and regions in diwaniya city. This study extended from 1/5/2012 – 27/11/ 2012. The samples were collected from clinically healthy and infected eyes of animals. (7) bacterial species were isolated they included Staphylococcus spp. 26.4% , E. coli 24.8%, Staphylococcus aureus 19% , Moraxella bovis 9.9% , Streptococcus spp. 8.3%, , , Pseudomonas spp. 8.3%, Proteus spp. 3.3%. The isolated bacteria were 121, Gram-positive bacteria were 63 (52.1%) while Gram-negative bacteria 58 (47.9%). Many types of bacteria isolated from healthy swabs 75 (62%) and 46 (38.1%) from infected swabs. The study also included isolation and identification of some species of fungi associated with the mycotic conjunctivitis in cattle, the observed study Aspergillus niger was the most frequent species isolated and was accounted to 37.5% of all isolates, while other fungi included Aspergillus fumigates 25% , Alternaria spp. 25% and Penicillium spp. 12.5%.

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Simone Aquino, José Eduardo Alves de Lima, Moisés Oliveira da Silva et Gabriela Fabricio de Sousa. « Multidrug-resistant bacteria isolated from automated teller machine in metropolitan area of São Paulo, Brazil ». World Journal of Biology Pharmacy and Health Sciences 5, n^o 1 (30 janvier 2021) : 027–36. http://dx.doi.org/10.30574/wjbphs.2021.5.1.0002.

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The aim of this study was to investigate bacterial contamination on surfaces of randomly selected Automated Teller Machine and their sensitivity to antibiotics in São Paulo city, Brazil. The swabs collected aseptically were inoculated in selective and non-selective media in triplicate and incubated at 37 °C for 24 h. After Gram staining the isolated colonies, complementary biochemical tests were applied. The antibiotic sensitivity pattern of all isolates (15 Gram-positive bacteria and 7 Gram-negative bacteria) was determined using the Kirk Bauer method using chloramphenicol, clindamycin, norfloxacin, erythromycin, gentamicin and tetracycline diffusion discs. All ATM surfaces tested were contaminated with at least one genus of bacteria. The most frequently isolated bacteria were Staphylococcus aureus (64%), Enterococcus spp. (28%) and Acinetobacter spp. (21%), followed by coagulase-negative staphylococci (14%), Pseudomonas spp. in 12 (14%), Salmonella spp. (7%), Escherichia coli (7%). ATMs in the São Paulo metropolitan region were shown to be contaminated with bacteria that are resistant to the commonly used antibiotics. All Gram-negative and Gram-positive bacteria isolated were multidrug-resistant, however, the strains were sensitive (S) or showed an intermediate response profile (I) to tetracycline, with the exception of three strains of Pseudomonas spp., Acinetobacter spp. and Staphylococcus aureus, which were resistant to tetracycline. Norfloxacin and gentamicin showed resistance response profile to all bacteria. Based on these findings, it is recommended to perform hand washing and use of antiseptics after using ATMs.

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Ahmed, Tasnia, Rajib Dey et Rashed Noor. « Drug Resistance Associated with Blood Borne Bacteria in Dhaka Metropolis ». Bangladesh Journal of Microbiology 35, n^o 2 (18 août 2019) : 134–40. http://dx.doi.org/10.3329/bjm.v35i2.42642.

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Blood borne infections are easy to contract during hospital procedures and can easily be transferred to other personnel in a healthcare setting. Bacteremia has become a common incidence and treatment is by administration of antibiotics. But this is not a simple task any more, since the pathogenic bacteria causing bacteremia are becoming resistant to a wide range of antibiotics. Blood samples were collected from outdoor patients seeking laboratory tests in Dhaka city. Blood samples were inoculated onto blood agar medium and after incubation for 37oC for 24 hours, bacterial isolates were identified and subjected to antibiotic susceptibility test by following the Kirby-Bauer method. The current present study deals with 100 patients of bacteremia from whom 150 isolates of 15 different bacterial genera have been collected among which the most prominent bacteria were Staphylococcus spp. (51 isolates), Pseudomonas spp. (19 isolates) and Escherichia spp. (19 isolates). After the antibiotic susceptibility test it was found that all isolates were resistant to a number of commonly used antibiotics. Twenty eight different antibiotics were used for this study. All isolates showed resistance to CAR, ATM, TOB, CXM, FD, CL, CAZ, AMC. NET and CN showed the most effective results (can effectively clear 9 and 10 types of isolates respectively found in this study). New discovery of drugs to fight these resistant pathogens is needed. In the meantime, safe administration of drugs, handling patients with appropriate protective personal clothing and apparatus, proper waste disposal managements in the hospital should be maintained strictly. Bangladesh J Microbiol, Volume 35 Number 2 December 2018, pp 134-140

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Niedzielski, Artur, Lechosław Paweł Chmielik et Tomasz Stankiewicz. « The Formation of Biofilm and Bacteriology in Otitis Media with Effusion in Children : A Prospective Cross-Sectional Study ». International Journal of Environmental Research and Public Health 18, n^o 7 (30 mars 2021) : 3555. http://dx.doi.org/10.3390/ijerph18073555.

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Background: Otitis media with effusion (OME) can cause serious complications such as hearing impairment or development delays. The aim of the study was to assess the microbiological profile of organisms responsible for OME and to determine if a biofilm formation can be observed. Methods: Ninety-nine samples from 76 patients aged from 6 months to 12 years were collected for microbiological and molecular studies. Results: In microbiological studies, pathogenic bacteria Haemophilus influenzae (38.89%), Streptococcus pneumoniae (33.33%), and Staphylococcus aureus MSSA (27.78%), as well as opportunistic bacteria Staphylococcus spp. (74.14%), Diphtheroids (20.69%), Streptococcus viridans (3.45%), and Neisseria spp. (1.72%) were found. The average degree of hearing loss in the group of children with positive bacterial culture was 35.9 dB, while in the group with negative bacterial culture it was 25.9 dB (p = 0.0008). The type of cultured bacteria had a significant impact on the degree of hearing impairment in children (p = 0.0192). In total, 37.5% of Staphylococcus spp. strains were able to form biofilm. Conclusions: Staphylococcus spp. in OME may form biofilms, which can explain the chronic character of the disease. Pathogenic and opportunistic bacteria may be involved in the etiopathogenesis of OME. The degree of hearing loss was significantly higher in patients from which the positive bacterial cultures were obtained.

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Rahamatunnabi, M., MR Ali, MA Islam et MT Hossain. « ISOLATION AND CHARACTERIZATION OF BACTERIA FROM KERATOCONJUNCTIVITIS AFFECTED CATTLE WITH THEIR PATHOGENICITY AND IN VITRO ANTIBIOTIC SENSITIVITY ». Bangladesh Journal of Veterinary Medicine 3, n^o 1 (21 juillet 2012) : 25–31. http://dx.doi.org/10.3329/bjvm.v3i1.11339.

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Isolation and characterization with antibiotic sensitivity of the bacteria in the eye swab of 34 keratoconjunctivitis affected cattle were carried out on the basis of their morphology, staining, cultural and biochemical properties during the period from October 1999 to March 2000. Staphylococcus spp. (76.5%), Streptococcus spp. (38.2%), E. coli (52.9%), Bacillus spp. (70.6%), unidentified Gram positive cocci (5.9%) and unidentified Gram negative rods (20.6%) were identified as a single or mixed infection. Pathogenicity study of these isolated organisms showed conjunctivitis associated with Staphylococcus spp., Streptococcus spp., Bacillus spp. and E. coli in experimentally inoculated mice whereas unidentified Gram positive cocci did not show any conjunctivitis in mice. The mixed intraocular inoculation of these isolated bacteria produced severe keratoconjunctivitis within 24 hours both in mice and calves. Results of antibiotic sensitivity test showed that all types of bacterial isolates were found highly sensitive to oxytetracyclin (80-100%) and chloramphenicol (70-100%). Staphylococcus spp., Streptococcus spp. and Bacillus spp. were moderately susceptible to streptomycin (69.56%), trisulfa (60%) and trisulfa (80%) respectively. It may be concluded that among the tested antibiotics, oxytetracyclin may have the preference in clinical therapy of keratoconjunctivitis in cattle caused by bacteria in Bangladesh.

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Hassan, Md Kamrul, Lubna Jahan, Papia Sultana, Alamgir Hasan et Mahbubul Pratik Siddique. « Detection and Antibiogram of Different Bacterial Agents From Market Goat Meat ». Research in Agriculture Livestock and Fisheries 8, n^o 1 (1 mai 2021) : 135–43. http://dx.doi.org/10.3329/ralf.v8i1.53275.

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The study was conducted to detect various pathogenic as well as spoilage bacteria present in goat meats and also their antibiogram. Different body regions such as brisket, neck and thigh, supplied at different places like Krishi market, Mohakhali kacha bazar, and Charulata market within Dhaka City Corporation area, were taken and the bacteria were isolated. The isolated bacteria were identified on the basis of cultural, morphological, and biochemical characteristics. The isolated bacterial agents were: Staphylococcus spp., Escherichia coli, Bacillus spp., Micrococcus spp., Streptococcus spp., Enterobacter spp., Proteus spp., Citrobacter spp., Salmonella spp., and Pseudomonas spp. Antibiotic susceptibility test using disc diffusion method revealed that most of the isolates were found to be more or less resistant to tetracycline, ampicillin and erythromycin indicating that these may be a threat to consumer’s health. It is emphasized that the present sanitary conditions, as revealed through this study, of meat processing need to be improved so as to minimize microbial contamination. Suggestions are made to introduce Longitudinally Integrated Safety Assurance (LISA) system and Good Manufacturing Practices (GMP) principles. Res. Agric., Livest. Fish.8(1): 135-143, April 2021

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Do Thi, Men, Le Pham Thi, Tuan Tran Van, Tuyet Lan Ninh Thị et Minh Huyen Nguyen Thi. « Isolation and identification of Bifidobacterium spp. from infant intestinal tract ». Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam 3, n^o 2 (30 juin 2020) : 125–32. http://dx.doi.org/10.47866/2615-9252/vjfc.104.

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As one of probiotic bacteria, Bifidobacterium is supplement in food industry such as in milk and yogurt. The advantageous impact of these bacteria for human health was reported. However, in Vietnam, supplement of these bacteria as probiotic source to the food was not much in food industry. In our experiment, Bifidobacterium are isolated from a feces sample of 7 days-child which only had mother milk. The bacterial isolated from infant intestinal tract was Bifidobacterium infantis (B. infantis, closest to Bifidobacterium longum ssp. infantis strain Bi-26 with gene bank accession CP054425.1). The techniques to identify these bacteria were MALDI Biotyper, PCR and sequencing. This experiment is original for further study the characters of these bacteria to apply them in our daily life.

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Matyjas, Tomasz, Lech Pomorski, Henryk Witas, Tomasz Płoszaj, Katarzyna Matyjas et Krzysztof Kaczka. « Cholelithiasis – always infected ? » Polish Journal of Surgery 89, n^o 3 (30 juin 2017) : 23–26. http://dx.doi.org/10.5604/01.3001.0010.1086.

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This study aims to present results regarding the presence and identification of bacterial strains found in bile and gallstones located in the gallbladder and bile ducts in patients operated on due to cholelithiasis. Materials and Methods. Bacterial culture was evaluated in 92 patients. There were 54 women (59%) and 38 men (41%) who underwent surgery on account of cholelithiasis and /or gallstones in bile ducts between 2013 and 2014. Bile and gallstone samples were cultured intraoperatively for bacteria; bacterial strains were identified, and their sensitivity to antibiotics was determined. Molecular methods (NGS and Sanger method) were used to separate bacterial strains in one of the gallbladder stones and the results were compared with bacterial strains grown from the bile. Results. Bile cultures were positive in 46 patients that is, 50% of the study group. The following bacteria strains were grown: Enterococcus spp. (44%), Escherichia coli (37%) and Klebsiella spp. (35%). Candidiasis accompanied by bacterial infection was detected in 7 patients (15%). Molecular testing of gallstones revealed DNA of Enterococcus spp., Escherichia spp., Streptococcus spp. and Clostridium spp. In the bile culture of the same patient Enterococcus spp. (avium and faecalis) was detected. Conclusion 1. More than one pathogen was grown on samples obtained from 31 patients (70%) with bile infection. 2. The most common pathogens include Enterococcus spp., Escherichia coli and Klebsiella spp. 3. Bacterial infections are often accompanied by a fungal infection (Candida albicans) 4. Bacterial strains grown from a gallstone sample partially corresponded with strains identified in the bile of the same patient.

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