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Academic literature on the topic 'Klebsiella K-31'
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Journal articles on the topic "Klebsiella K-31"
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Amatya, Puja, Suchita Joshi, and Shrijana Shrestha. "Outbreak of Extended Spectrum Beta Lactamase Producing Klebsiella Species Causing Neonatal Sepsis at Patan Hospital in Nepal." Journal of Patan Academy of Health Sciences 1, no. 1 (2015): 20–25. http://dx.doi.org/10.3126/jpahs.v1i1.13011.
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Introductions: Klebsiella sepsis is the most important nosocomial infection in neonates. The objectives of this study were to review an outbreak in a neonatal unit caused by Klebsiella species, to identify the source of the infections, and to identify infection control measures for eradication and prevention of these infections. Methods: The case notes and investigation reports of all sepsis cases admitted in neonatal units of Patan hospital from July to December 2011 caused by Klebsiella species were retrospectively reviewed. The demographic profile, risk factors along with clinical features and management of sepsis were reviewed. Results: Twenty three out of 37 neonatal blood cultures grew Klebsiella species. Thirty one were K. pneumoniae and six K. oxytoca. Seventeen of the 31 (55%) K. pneumoniae isolates were multidrug resistant and extended spectrum beta lactamase producers. Eighteen of 23 (78%) neonates with Klebsiella sepsis died. After extensive cleaning methods and identifying an intermittently leaking roof in one of the nurseries below a vescicovaginal fistula room of gynecological ward above, the infection outbreak was finally controlled. Conclusions: Infections with extended spectrum beta lactamase producing Klebsiella spp. are a threat in neonatal units because of limited treatment options for these multidrug resistant organisms. Identification of the source and control of the outbreak can be a challenge. Plain Language Summary: The study was done to review an outbreak caused by Klebsiella species, to identify the source of the infections along with infection control measures for eradication and prevention of these infections in neonate unit. Identification of the source and eradication of the outbreak of Klebsiella species can be a challenge. Hand washing remains one of the most important methods to prevent cross infections and nosocomial infections. DOI: http://dx.doi.org/10.3126/jpahs.v1i1.13011 Journal of Patan Academy of Health Sciences. 2014 Jun;1(1):20-25
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Tan, Demeng, Yiyuan Zhang, Mengjun Cheng, et al. "Characterization of Klebsiella pneumoniae ST11 Isolates and Their Interactions with Lytic Phages." Viruses 11, no. 11 (2019): 1080. http://dx.doi.org/10.3390/v11111080.
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The bacterial pathogen Klebsiella pneumoniae causes urinary tract infections in immunocompromised patients. Generally, the overuse of antibiotics contributes to the potential development and the spread of antibiotic resistance. In fact, certain strains of K. pneumoniae are becoming increasingly resistant to antibiotics, making infection by these strains more difficult to treat. The use of bacteriophages to control pathogens may offer a non-antibiotic-based approach to treat multidrug-resistant (MDR) infections. However, a detailed understanding of phage–host interactions is crucial in order to explore the potential success of phage-therapy for treatment. In this study, we investigated the molecular epidemiology of nine carbapenemase-producing K. pneumoniae isolates from a local hospital in Shanghai, China. All strain isolates belong to sequence type 11 (ST11) and harbor the blaKPC-2 gene. The S1-PFGE (S1 nuclease pulsed field gel electrophoresis) pattern of the isolates did not show any relationship to the multilocus sequence typing (MLST) profiles. In addition, we characterized phage 117 and phage 31 and assessed the potential application of phage therapy in treating K. pneumoniae infections in vitro. The results of morphological and genomic analyses suggested that both phages are affiliated to the T7 virus genus of the Podoviridae family. We also explored phage–host interactions during growth in both planktonic cells and biofilms. The phages’ heterogeneous lytic capacities against K. pneumoniae strains were demonstrated experimentally. Subsequent culture and urine experiments with phage 117 and host Kp36 initially demonstrated a strong lytic activity of the phages. However, rapid regrowth was observed following the initial lysis which suggests that phage resistant mutants were selected in the host populations. Additionally, a phage cocktail (117 + 31) was prepared and investigated for antimicrobial activity. In Luria Broth (LB) cultures, we observed that the cocktail showed significantly higher antimicrobial activity than phage 117 alone, but this was not observed in urine samples. Together, the results demonstrate the potential therapeutic value of phages in treating K. pneumoniae urinary tract infections.
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Cheng, Yi-Hsiang, Tzu-Wen Huang, Chih-Han Juan, et al. "Tigecycline-non-susceptible hypervirulent Klebsiella pneumoniae strains in Taiwan." Journal of Antimicrobial Chemotherapy 75, no. 2 (2019): 309–17. http://dx.doi.org/10.1093/jac/dkz450.
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Abstract Objectives Emergent antimicrobial-resistant hypervirulent Klebsiella pneumoniae (hvKp) is an important public health issue. We aimed to investigate resistance mechanisms and hypervirulent traits among tigecycline-non-susceptible (TNS) K. pneumoniae clinical strains, focusing on one hvKp strain with in vivo evolution of tigecycline resistance. Methods TNS K. pneumoniae strains causing invasive diseases in a medical centre in Taiwan between July 2015 and April 2018 were collected. Resistance mechanisms were determined and hvKp strains were defined as rmpA/rmpA2-carrying strains. Isogenic strains with and without tigecycline resistance were subjected to WGS and in vivo virulence testing. Further, site-directed mutagenesis was used to confirm the resistance mechanism. Results In total, 31 TNS K. pneumoniae strains were isolated, including six hypervirulent strains. Tigecycline resistance mechanisms were mostly caused by overexpression of AcrAB and OqxAB together with up-regulation of RamA or RarA, respectively. One TNS hypervirulent strain (KP1692; MIC=6 mg/L) derived from its tigecycline-susceptible counterpart (KP1677; MIC=0.75 mg/L) showed acrAB overexpression. WGS revealed four genetic variations between KP1677 and KP1692. In addition, using site-directed mutagenesis, we confirmed that a 1 bp insertion in the ramA upstream region (RamR-binding site), leading to ramA and acrAB overexpression in KP1692, was responsible for tigecycline resistance. The in vivo virulence experiment showed that the TNS hvKp strain KP1692 still retained its high virulence compared with KP1677. Conclusions hvKp strains accounted for 19.4% among TNS strains. We identified alterations in the ramA upstream region as a mechanism of in vivo tigecycline resistance development in an hvKp strain.
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Grigorova, E. V., L. V. Rychkova, E. I. Ivanova, U. M. Nemchenko, and M. V. Savelkaeva. "DETECTION OF GENETIC DETERMINANTS OF PATHOGENICITY OF STRAINS OF KLEBSIELLA SPP. ISOLATED FROM THE INTESTINAL BIOTOPE OF CHILDREN WITH FUNCTIONAL GASTROINTESTINAL DISORDERS." Acta Biomedica Scientifica 3, no. 5 (2018): 60–65. http://dx.doi.org/10.29413/abs.2018-3.5.9.
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Functional gastrointestinal disorders (FGID) are one of the most common problems in children of the first year of life. The aim of the study was to assess the pathogenic potential of Klebsiella spp. strains, isolated from the colon in children of the first year of life with FGID. Material for the study included 61 coprological samples. The biological material was divided into comparison groups, depending on the type of Klebsiella excreted at a concentration of 105–108 CFU/g: 1st – with vegetation in the colon K. pneumoniae (n = 30); 2nd – with vegetation K. oxytoca (n = 31). Bacteriological study composition of the intestinal contents was carried out according to the Industry standard “Protocol of management of patients. Intestinal dysbiosis” (2003). Identification was carried out according to generally accepted schemes using commercial test systems for biochemical identification of bacteria. Statistical data processing was performed using licensed applications “MS Office Excel 2003 for Windows 7”. The data on the quantitative and qualitative changes in the composition microbiota in the comparison groups were obtained. The results of detection genetic determinants of pathogenicity in the samples of Klebsiella of two species show that among the strains of Klebsiella spp., vegetating in the intestines of children as a component of an allochthonous microbiota, a sufficiently high and virulent potential can be concentrated. Detection of pathogenicity genes in bacteria of the genus Klebsiella will expand and deepen the problem of finding the structures of adaptation of strains of bacteria that cause FGID in children of the first year of life.
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Feizabadi, Mohammad Mehdi, Akram Shahrbai Farahani, Marveh Rahmati, and Soroor Asadi. "Caracterização fenotípica e análise plasmidial de cepas de Klebsiella pneumoniae em pacientes iranianos." Revista de Ciências Médicas e Biológicas 7, no. 3 (2008): 273. http://dx.doi.org/10.9771/cmbio.v7i3.4471.
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É importante os conhecimentos locais de susceptibilidade antimicrobiana para Klebsiella pneumoniae a fim de que haja uma implementação efetiva de política hospitalar em relação aos anti- bacterianos. Foram isoladas 100 culturas para K. pneumoniae coletadas a partir de 3 diferentes hospitais no Irã durante o ano de 2004; para a susceptibilidade foram selecionados treze antibióticos diferentes, utilizando o método de difusão em disco e ensaio em caldo de diluição. Os isolados foram então submetidos à análise de endonucleases restritas ao DNA plasmidial. Todos os isolados foram sensíveis ao imipenem. As taxas de resistência a outros antibióticos foram na seguinte ordem: amicacina (10%), piperacilina-tazobactam (2%), ciprofloxacina (20%), ceftizoxima (14%), cefexime (31%), ceftazidima (28%) , cefotaxima (33%), ácido nalidíxico (32%), cefalexina (32%), gentamicina (30%), nitrofurantoína (31%) e piperacilina (66%). A produção de betalactamase de espectro estendido (ESBL) que hidrolisa a ceftazidima e a cefotaxima foi detectada em 54% dos isolados. Das 100 amostras testadas, 67 portavam plasmídeos e o restante faltava qualquer plasmidial. Embora a prevalência do fenótipo ESBL no Irã seja superior a países ocidentais, os números reportados são restritos de uma região. As evidências de focos com certos isolados de K. pneumoniae foram encontradas pela análise das endonucleases restritas de DNA plasmidial. Esta técnica também mostrou a persistência de infecções do trato urinário de vários pacientes.
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Vu Thi Ngoc, Bich, Sylvain Brisse, Trinh Dao Tuyet, et al. "Klebsiella pneumoniae with capsule type K64 is overrepresented among invasive disease in Vietnam." F1000Research 10 (June 8, 2021): 454. http://dx.doi.org/10.12688/f1000research.52799.1.
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Introduction: Recent reports indicate the emergence of community-acquired pneumonia associated with K64-Klebsiella pneumoniae. Here, we identify the capsular types and sequence type of invasive and commensal K. pneumoniae isolates from Vietnam. Methods: We included 93 K. pneumoniae isolates from patients hospitalized at the National Hospital for Tropical Diseases, Hanoi between 2007 and 2011; and 110 commensal isolates from throat swabs from healthy volunteers living in rural and urban Hanoi in 2012. We determined sequence types (STs) by multi-locus sequence typing (MLST) and capsule typing for seven K types by PCR. Antibiotic susceptibility testing was performed using disk diffusion. Results: The most common detected capsule types were K1 (39/203, 19.2%, mainly ST23) and K2 (31/203, 15.3%, multiple STs: ST65, ST86, ST380). We found significantly more K2 isolates among invasive in comparison to commensal isolates (22.6% vs 9%, p = 0.01) but no significant difference was observed between invasive and commensal K1 isolates (14.5% vs 24.7%, p = 0.075). K64 with varying sequence types were predominantly seen among invasive K. pneumoniae (8 vs. 3) and were isolated from sepsis and meningitis patients. Among K64 isolates, one was carbapenem-resistant with ST799. Conclusion: Our study confirms that capsule type K64 K. pneumoniae is associated with community-acquired invasive infections in Vietnam. Research is needed to unravel the mechanisms of virulence of capsule type K64 in both community and hospital settings.
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García Toscano, Yina, Margarita Filott Támara, Mirna Campo Urbina, Lucila Gómez Rodriguez, and Alfonso Bettín Martínez. "Perfiles de los fenotipos de resistencia en Escherichia coli y Klebsiella pneumoniae en Barranquilla, Colombia." Revista Ciencias Biomédicas 9, no. 1 (2020): 15–24. http://dx.doi.org/10.32997/rcb-2020-3039.
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Introducción: La aparición y rápida diseminación de Escherichia coli (E. coli) y Klebsiella pneumoniae (K. pneumoniae)resistentes a cefalosporinas de tercera generación se considera como un problema de salud pública a nivel mundial.Objetivo: determinar el perfil de susceptibilidad de E. coli y K. pneumoniae resistentes a cefalosporinas de tercera generación de cuatro instituciones de salud de la ciudad de Barranquilla, Colombia. Métodos: estudio descriptivo de corte transversal. Se tomaron registros de 1250 aislamientos (835 E. coli y 415 K. pneumoniae) productores de beta-lactamasas de espectro extendido (BLEE) por método de concentración inhibitoria mínima, reportados por las instituciones participantes. Se analizó una muestra por conveniencia de 100 cepas de E. coli y 64 de K. pneumoniae. Los aislamientos se clasificaron en perfiles de resistencia: perfiles (I – III) de E. coli y perfiles (I – IV) de K. pneumoniae, indicando resistencia a otros antibióticos beta-lactámicos y a otras familias de antibióticos.Resultados: la prevalencia de E. coli y K. pneumoniae productoras de BLEE fue 23,5% y 26,7%. Los servicios afectados fueron urgencias (32 y 12,5%), consulta externa (31 y 7,81%), hospitalizados (28 y 46,87%) y cuidados intensivos (9 y 32,81%) respectivamente. Se encontró alta sensibilidad a carbapenémicos, piperacilina-tazobactam, cefoxitin y cefepime. Alta resistencia a trimetoprim-sulfametoxazol y ciprofloxacina.Conclusiones: los perfiles fenotípicos de BLEE circulantes en los servicios hospitalarios de instituciones de Barranquilla se acompañan de multirresistencia a cefepime, trimetoprim-sulfametoxazol, ciprofloxacina y gentamicina, sin embargo, aún mantienen alta sensibilidad a los carbapenemes, piperacilina-tazobactam y amikacina.
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Kim, Eun Sil, Jin-Yong Jeong, Jae-Bum Jun, et al. "Prevalence of aac(6′)-Ib-cr Encoding a Ciprofloxacin-Modifying Enzyme among Enterobacteriaceae Blood Isolates in Korea." Antimicrobial Agents and Chemotherapy 53, no. 6 (2009): 2643–45. http://dx.doi.org/10.1128/aac.01534-08.
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ABSTRACT The aac(6′)-Ib gene was detected in 86 of 555 (15.5%) Enterobacteriaceae isolates. Among these 86 aac(6′)-Ib-positive isolates, 19 (22.0%) were positive for aac(6′)-Ib-cr: 4 of 31 (12.9%) Enterobacter spp., 7 of 13 (53.8%) Escherichia coli isolates, and 8 of 42 (19.0%) Klebsiella pneumoniae isolates. There was a strong association between aac(6′)-Ib-cr and OXA-1 and CTX-M-1 group β-lactamase genes. One aac(6′)-Ib-positive K. pneumoniae isolate carried both aac(6′)-Ib-cr and qnrS.
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Yadav, Kumari Ragani, Ganesh Kumar Singh, Sujit Bhattacharjee, and Kewal Shrestha. "Study of Extended Spectrum Beta-Lactamases Producing Escherichia Coli and Klebsiella Species in a Tertiary Care Hospital, Biratnagar, Nepal." Journal of Nobel Medical College 8, no. 2 (2019): 31–36. http://dx.doi.org/10.3126/jonmc.v8i2.26743.
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Background: Escherichia coli and Klebsiella species are most common ESBL producers and associated with UTI in both community and hospital setting, often limiting the treatment therapy of UTI. Aim of present study was Isolation and Identification of ESBL producing E. coli and Klebsiella Species in urine sample from cases of UTI and their antibiotic susceptibility pattern at Nobel Medical College Teaching Hospital, Biratnagar, Nepal.
 Materials and Methods: This descriptive cross-sectional study was conducted at Nobel Medical College with effect from October 2018 to June 2019 after approval from the Institutional Review Committee (IRC) of the college as per clinical laboratory standards institute of (CLSI) guidelines.
 Results: Out of total 2567 urine samples, 631(24.5%) samples showed microbial growth. Among which E. coli was 288(45.6%), Klebsiella species were 20(31.5%), other gram-negative bacteria were 158(25%), gram positive bacteria were 114(18%) and fungus 51(8%) were recovered. Out of 631 culture positive urine samples, 308 urine samples were positive for E. coli/K. species 288(93.5%)/20(42.5%) respectively. Among which ESBL isolates were 213(69%) and non ESBL isolates were 95(31%). All ESBL producing E. coli and K. species were found (100%) sensitive to meropenem. Similarly, among other antibiotics also showed increased susceptibility towards the piperacillin/tazobactum (97.2%),cefoperazone/sulbactum (94.4%) and amikacin (93.0%).
 Conclusion: The highest numbers of ESBL producers E. coli and K. species from urine sample are increasing day by day and creating serious problem in treating patients in Nepal. So it should be mandatory and very essential to have routine monitoring system to detect the ESBL producing isolates in clinical laboratories.
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Kiley, John, Katrin Mende, Susan J. Kaiser, et al. "1198. Clinical Characteristics and Outcomes of Klebsiella pneumoniae Infections in Service Members Who Sustained Trauma in Iraq and Afghanistan." Open Forum Infectious Diseases 5, suppl_1 (2018): S362—S363. http://dx.doi.org/10.1093/ofid/ofy210.1031.
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Abstract Background Klebsiella pneumoniae infections present a challenge to the clinician due to increasing resistance. K. pneumoniae was the third most common species of multidrug-resistant (MDR) Gram-negative organism in trauma patients sustaining injuries in Iraq and Afghanistan from 2009 to 2014. This study aims to elucidate the epidemiology of these infections by characterizing clinical aspects, risk for MDR infections, and outcomes. Methods All initial and serial (≥7 days from prior isolate) infecting K. pneumoniae isolates were collected from the Trauma Infectious Disease Outcomes Study (TIDOS) (6/09-12/14). Antimicrobial susceptibilities were determined using the BD Phoenix Automated Microbiology System and CLSI criteria. MDR was defined as either resistance to ≥3 classes of aminoglycosides, β-lactams, carbapenems and/or fluoroquinolones or production of an ESBL or KPC. Results Of 588 K. pneumoniae isolates in the TIDOS registry, 141 infecting isolates (98 initial) from 51 patients met inclusion criteria. Initial isolates were respiratory (31%), wound (25%), blood (20%), urine (10%), intra-abdominal (8%) and other (6%). All patients were male with a median age of 23 years (IQR 21–28). The majority of patients (82%) suffered blast injuries; of which, 88% were from improvised explosive devices. Patients had a median injury severity score (ISS) of 38 (IQR 30–45) and time from injury to first infecting K. pneumoniae isolate was 15 days (IQR 8–31). The median hospital stay was 49 days (IQR 28–70) and four patients died. All patients had received antibiotics prior to diagnosis. Twenty-three (46%) patients had initial isolates classified as MDR. There was no difference in age, ISS, or time from injury to first isolation among those who did and did not have initial MDR isolates. Sixteen patients had 64 serial isolates, of which 24 were wound, 20 respiratory, 14 blood and six urine. Three of these 16 patients died compared with 1 of 35 patients without serial isolates. Conclusion K. pneumoniae infections are common among combat casualties. Patients with K. pneumoniae infections were severely injured and almost half of initial infecting isolates were MDR, complicating treatment. Disclosures All authors: No reported disclosures.