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Journal articles on the topic 'Salmonella regrowth'

Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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1

Rodríguez-López, María Isabel, Vicente M. Gómez-López, Viktorija Lukseviciute, and Zivile Luksiene. "Modeling the Inactivation and Possible Regrowth of Salmonella enterica Treated with Chlorophyllin-Chitosan and Visible Light." Food Technology and Biotechnology 58, no. 1 (April 22, 2020): 64–70. http://dx.doi.org/10.17113/ftb.58.01.20.6374.

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The study focuses on predictive modelling of inactivation of Salmonella enterica after treatment with chlorophyllin-chitosan complex and visible light. Salmonella cells were incubated with chlorophyllin-chitosan complex (0.001 % chlorophyllin and 0.1 % chitosan) for different times (5-60 min) and then illuminated with visible light (λ=405 nm, He=38 J/cm2). Inactivation curves and post-treatment regrowth curves were built based on microbiological viability tests and data were fitted to ten inactivation and two regrowth models. The photoactivated complex reduced Salmonella population, which were

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2

Burge, Wylie D., Nancy K. Enkiri, and David Hussong. "Salmonella regrowth in compost as influenced by substrate (salmonella regrowth in compost)." Microbial Ecology 14, no. 3 (November 1987): 243–53. http://dx.doi.org/10.1007/bf02012944.

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3

Gözen, İrep, and Banu Örmeci. "Effect of daylight on regrowth of bacteria in anaerobically digested sludge." Water Science and Technology 62, no. 2 (July 1, 2010): 364–69. http://dx.doi.org/10.2166/wst.2010.268.

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This study investigated the regrowth of total coliform, Salmonella, and Clostridium perfringens in anaerobically digested sludge after centrifuge dewatering in the presence and absence of daylight. Sludge cake and centrate samples were collected from a treatment plant, and half of the samples was stored in daylight and the other half was stored in dark for three weeks. The bacteria levels in the cake and centrate samples were measured periodically throughout the storage period, and all three bacteria showed substantial regrowth. Presence of daylight increased the regrowth of Salmonella both in

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4

Gerba, Charles P., Nohelia Castro-del Campo, John P. Brooks, and Ian L. Pepper. "Exposure and risk assessment of Salmonella in recycled residuals." Water Science and Technology 57, no. 7 (April 1, 2008): 1061–65. http://dx.doi.org/10.2166/wst.2008.235.

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The potential health effects of Salmonella found in wastewater residuals is dependent on the exposure of individuals to the organism. This paper provides a risk assessment for human infection from Salmonella due to direct contact with Class B biosolids, and from contact with Class A biosolids following regrowth of Salmonella. In addition, a risk assessment is provided for infection via airborne transport of bioaerosols from Class B biosolids and biosolids in which regrowth had occurred, to off-site communities. Results of the risk characterization imply that the risk of human infection from di

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5

Eamens, G. J., A. M. Waldron, and P. J. Nicholls. "Survival of pathogenic and indicator bacteria in biosolids applied to agricultural land." Soil Research 44, no. 7 (2006): 647. http://dx.doi.org/10.1071/sr06015.

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Concentrations of surviving Escherichia coli, Clostridium perfringens, and Salmonella spp. were determined temporally in mechanically dewatered biosolids derived from anaerobic–mesophilic digestion and applied to agricultural land. Following applications in different seasons, repeated assessments of bacterial concentrations in biosolid clumps, using most-probable-number (MPN) techniques, found sustained high levels of these bacteria. Bacterial concentrations were often well above soil background levels at 6 months, and in some cases 11–12 months, after land application. Survival in surface-app

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6

AL-Gheethi, Adel A. S., I. Norli, and Mohd Omar Ab Kadir. "Elimination of enteric indicators and pathogenic bacteria in secondary effluents and lake water by solar disinfection (SODIS)." Journal of Water Reuse and Desalination 3, no. 1 (March 1, 2013): 39–46. http://dx.doi.org/10.2166/wrd.2013.060.

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The reduction of enteric indicators (fecal coliforms (FC) and Enterococcus faecalis) and elimination of pathogenic bacteria (Salmonella spp. and Staphylococcus aureus) in the secondary effluents and lake water by solar disinfection (SODIS) was studied in this article. FC, E. faecalis, Salmonella spp. and S. aureus were isolated and enumerated using membrane filtration techniques after SODIS of samples inside transparent polyethylene terephthalate (PET) bottles for 1, 2, 3, 4, 5, 6, 7 and 8 h. The results show that SODIS can reduce numbers of FC, Salmonella spp. and S. aureus by more than 4 log

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7

Sidhu, J. "The role of indigenous microorganisms in suppression of salmonella regrowth in composted biosolids." Water Research 35, no. 4 (March 2001): 913–20. http://dx.doi.org/10.1016/s0043-1354(00)00352-3.

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8

Sidhu, J., R. A. Gibbs, G. E. Ho, and I. Unkovich. "Selection of Salmonella Typhimurium as an indicator for pathogen regrowth potential in composted biosolids." Letters in Applied Microbiology 29, no. 5 (November 1999): 303–7. http://dx.doi.org/10.1046/j.1365-2672.1999.00626.x.

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9

Peng, Linda X., Morgan Wallace, Bridget Andaloro, Dawn Fallon, Lois Fleck, Dan Delduco, and George Tice. "Modification of the BAX® System PCR Assay for Detecting Salmonella in Beef, Produce, and Soy Protein Isolate." Journal of AOAC INTERNATIONAL 94, no. 1 (January 1, 2011): 172–78. http://dx.doi.org/10.1093/jaoac/94.1.172.

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Abstract The BAX® System PCR assay for Salmonella detection in foods was previously validated as AOAC Research Institute (RI) Performance Tested MethodSM (PTM) 100201. New studies were conducted on beef and produce using the same media and protocol currently approved for the BAX System PCR assay for E. coli O157:H7 multiplex (MP). Additionally, soy protein isolate was tested for matrix extension using the U.S. Food and Drug Administration-Bacteriological Analytical Manual (FDA-BAM) enrichment protocols. The studies compared the BAX System method to the U.S. Department of Agriculture culture me

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10

Morishige, Yuta, Atsushi Koike, Ai Tamura-Ueyama, and Fumio Amano. "Induction of Viable but Nonculturable Salmonella in Exponentially Grown Cells by Exposure to a Low-Humidity Environment and Their Resuscitation by Catalase." Journal of Food Protection 80, no. 2 (January 24, 2017): 288–94. http://dx.doi.org/10.4315/0362-028x.jfp-16-183.

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ABSTRACTSalmonella is a major cause of foodborne disease that sometimes occurs in massive outbreaks around the world. This pathogen is tolerant of low-humidity conditions. We previously described a method for induction of viable but nonculturable (VBNC) Salmonella enterica serovar Enteritidis by treatment with hydrogen peroxide (H2O2) and subsequent resuscitation with 0.3 mM sodium pyruvate. Here, we report a new method for the induction of the VBNC state in Salmonella Enteritidis cells, one involving dehydration. Exposure of Salmonella Enteritidis cells to dehydration stress under poor nutrit

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ANDERSON, ROBIN C., YONG S. JUNG, CHRISTY E. OLIVER, SHANE M. HORROCKS, KENNETH J. GENOVESE, ROGER B. HARVEY, TODD R. CALLAWAY, THOMAS S. EDRINGTON, and DAVID J. NISBET. "Effects of Nitrate or Nitro Supplementation, with or without Added Chlorate, on Salmonella enterica Serovar Typhimurium and Escherichia coli in Swine Feces†." Journal of Food Protection 70, no. 2 (February 1, 2007): 308–15. http://dx.doi.org/10.4315/0362-028x-70.2.308.

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The effects of coincubating the active agent of an experimental chlorate product with nitrate or select nitro compounds, possible inducers and competing substrates for the targeted respiratory nitrate reductase, on concentrations of experimentally inoculated Salmonella enterica serovar Typhimurium and indigenous Escherichia coli were determined. Studies were completed in swine fecal suspensions as a prelude to the administration of these inhibitors to pigs. Results confirmed the bactericidal effect of chlorate (5 to 10 mM) against these fecal enterobacteria, reducing (P &lt; 0.05) concentr

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12

Rosu, Valentina, та Kelly T. Hughes. "σ28-Dependent Transcription in Salmonella enterica Is Independent of Flagellar Shearing". Journal of Bacteriology 188, № 14 (15 липня 2006): 5196–203. http://dx.doi.org/10.1128/jb.00299-06.

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ABSTRACT The FlgM anti-σ28 factor is secreted in response to flagellar hook-basal body completion to allow σ28-dependent transcription of genes needed late in flagellar assembly, such as the flagellin structural gene, fliC. A long-standing hypothesis was that one role of FlgM secretion was to allow rapid expression of flagellin in response to shearing. We tested this hypothesis by following FlgM secretion and fliC transcription in response to flagellar shearing. Experiments showed that the level of FlgM inside the cell was unchanged after shearing whereas the extracellular FlgM levels increase

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13

Metaane, Selma, Véronique Monteil, Sophie Ayrault, Louise Bordier, Corinne Levi-Meyreuis та Françoise Norel. "The stress sigma factor σS/RpoS counteracts Fur repression of genes involved in iron and manganese metabolism and modulates the ionome of Salmonella enterica serovar Typhimurium". PLOS ONE 17, № 3 (31 березня 2022): e0265511. http://dx.doi.org/10.1371/journal.pone.0265511.

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In many Gram-negative bacteria, the stress sigma factor of RNA polymerase, σS/RpoS, remodels global gene expression to reshape the physiology of quiescent cells and ensure their survival under non-optimal growth conditions. In the foodborne pathogen Salmonella enterica serovar Typhimurium, σS is also required for biofilm formation and virulence. We have previously identified sRNAs genes positively controlled by σS in Salmonella, including the two paralogous sRNA genes, ryhB1 and ryhB2/isrE. Expression of ryhB1 and ryhB2 is repressed by the ferric uptake regulator Fur when iron is available. In

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14

Mecha, Achisa C., Maurice S. Onyango, Aoyi Ochieng, and Maggy NB Momba. "Modelling inactivation kinetics of waterborne pathogens in municipal wastewater using ozone." Environmental Engineering Research 25, no. 6 (December 6, 2019): 890–97. http://dx.doi.org/10.4491/eer.2019.432.

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Microbial water pollution is a key concern leading to waterborne diseases. This study evaluated the disinfection of wastewater using ozonation. The following aspects were investigated: inactivation efficiency against <i>Escherichia coli, Salmonella</i> species, <i>Shigella</i> species, and <i>Vibrio cholerae</i>; modelling of inactivation kinetics using disinfection models; and evaluation of microbial regrowth studies. 99% bacterial inactivation was obtained within 15 min, irrespective of the water matrix, showing the strong oxidizing potential of ozone. The

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15

Liang, L., S. G. Goh, G. G. R. V. Vergara, H. M. Fang, S. Rezaeinejad, S. Y. Chang, S. Bayen, et al. "Alternative Fecal Indicators and Their Empirical Relationships with Enteric Viruses, Salmonella enterica, and Pseudomonas aeruginosa in Surface Waters of a Tropical Urban Catchment." Applied and Environmental Microbiology 81, no. 3 (November 21, 2014): 850–60. http://dx.doi.org/10.1128/aem.02670-14.

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ABSTRACTThe suitability of traditional microbial indicators (i.e.,Escherichia coliand enterococci) has been challenged due to the lack of correlation with pathogens and evidence of possible regrowth in the natural environment. In this study, the relationships between alternative microbial indicators of potential human fecal contamination (Bacteroides thetaiotaomicron,Methanobrevibacter smithii, human polyomaviruses [HPyVs], and F+ and somatic coliphages) and pathogens (Salmonellaspp.,Pseudomonas aeruginosa, rotavirus, astrovirus, norovirus GI, norovirus GII, and adenovirus) were compared with

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16

Vogler, A. P., M. Homma, V. M. Irikura, and R. M. Macnab. "Salmonella typhimurium mutants defective in flagellar filament regrowth and sequence similarity of FliI to F0F1, vacuolar, and archaebacterial ATPase subunits." Journal of Bacteriology 173, no. 11 (1991): 3564–72. http://dx.doi.org/10.1128/jb.173.11.3564-3572.1991.

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17

BELETE, TAMRAT, ERIN CROWLEY, PATRICK BIRD, JOSEPH GENSIC, and F. MORGAN WALLACE. "A Comparison of the BAX System Method to the U.S. Food and Drug Administration's Bacteriological Analytical Manual and International Organization for Standardization Reference Methods for the Detection of Salmonella in a Variety of Soy Ingredients." Journal of Food Protection 77, no. 10 (October 1, 2014): 1778–83. http://dx.doi.org/10.4315/0362-028x.jfp-14-063.

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The performances of two DuPont BAX System PCR assays for detecting Salmonella on a variety of low-moisture soy ingredients were evaluated against the U.S. Food and Drug Administration's Bacteriological Analytical Manual (FDA BAM) method or the International Organization for Standardization (ISO) 6579 reference method. These evaluations were conducted as a single laboratory validation at an ISO 17025 accredited third-party laboratory. Validations were conducted on five soy ingredients: isolated soy protein (ISP), soy fiber, fluid soy lecithin, deoiled soy lecithin, and soy nuggets, using a pair

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18

Lefevre, F., J. M. Audic, and F. Ferrand. "Peracetic Acid Disinfection of Secondary Effluents Discharged off Coastal Seawater." Water Science and Technology 25, no. 12 (June 1, 1992): 155–64. http://dx.doi.org/10.2166/wst.1992.0347.

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Peracetic acid (PAA), a well known powerful antimicrobial agent in hospitals and in agribusiness (Fraser, 1986), has recently been used to disinfect urban effluents. It appears to be highly competitive against chlorine (Audic, 1990; Baldry, French, Slater and Desprez, 1990; Giodani, Iacoponi, Polidori, 1989), the most widely used disinfectant for sewage disposal. As PAA is a new biocide, not much quantitative data is available on its action against the faecal indicator bacteria and viruses. An on-site experimental study investigated the disinfectant action of PAA against these indicator bacter

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Aguilar, P., B. Jiménez, C. Maya, T. Orta de Velasquez, and V. Luna. "Disinfection of sludge with high pathogenic content using silver and other compounds." Water Science and Technology 54, no. 5 (September 1, 2006): 179–87. http://dx.doi.org/10.2166/wst.2006.561.

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A physicochemical sludge with high microbial content (102–104 FPU/g TS bacteriophages, 106–107 MPN/g TS faecal coliforms, 104 MPN/g TS Salmonella spp., 104 MPN/g TS Shigella spp., 103 MPN/g TS Pseudomonas aeruginosa,102 MPN/g TS Vibrio cholerae, 102–103 cysts/g TS Giardia sp., 102–104 oocyts/g TS Cryptosporidium sp., 168–215 viable helminth ova/g TS) was disinfected using silver, silver-copper, and silver-copper plus a synergistic agent (SA). Twenty milligrams Ag/g TS inactivated 4.8 log of faecal coliforms in 1 h; however, 40 mg Ag/g TS are needed to reduce helminth ova viability from 84 to 3

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Bosshard, Franziska, Michael Berney, Michael Scheifele, Hans-Ulrich Weilenmann, and Thomas Egli. "Solar disinfection (SODIS) and subsequent dark storage of Salmonella typhimurium and Shigella flexneri monitored by flow cytometry." Microbiology 155, no. 4 (April 1, 2009): 1310–17. http://dx.doi.org/10.1099/mic.0.024794-0.

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Pathogenic enteric bacteria are a major cause of drinking water related morbidity and mortality in developing countries. Solar disinfection (SODIS) is an effective means to fight this problem. In the present study, SODIS of two important enteric pathogens, Shigella flexneri and Salmonella typhimurium, was investigated with a variety of viability indicators including cellular ATP levels, efflux pump activity, glucose uptake ability, and polarization and integrity of the cytoplasmic membrane. The respiratory chain of enteric bacteria was identified to be a likely target of sunlight and UVA irrad

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Jiménez, B., A. Chávez, C. Maya, and L. Jardines. "Removal of microorganisms in different stages of wastewater treatment for Mexico City." Water Science and Technology 43, no. 10 (May 1, 2001): 155–62. http://dx.doi.org/10.2166/wst.2001.0607.

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In this study the removal of a diversity of microorganisms during different stages of treatment was evaluated. The process scheme consisted of Advanced Primary Treatment (APT), sand filtration, and chlorine disinfection. During the first 2 stages, fecal coliforms were reduced from 1.24×109 to 1.2×108 MPN/100 mL and helminth ova were reduced to less than 1 ova/L. Nevertheless, to obtain an effluent water quality that meets the microbiological standards recommended by the World Health Organization (1989) and the Mexican norm for water destined for agricultural reuse it was necessary to disinfect

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Rouch, Duncan A., Tania Mondal, Sneha Pai, Florian Glauche, Vennessa A. Fleming, Nerida Thurbon, Judy Blackbeard, Stephen R. Smith, and Margaret Deighton. "Microbial safety of air-dried and rewetted biosolids." Journal of Water and Health 9, no. 2 (April 18, 2011): 403–14. http://dx.doi.org/10.2166/wh.2011.134.

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To assess microbial safety of treated sewage sludge (biosolids), we examined the inactivation of microbial indicators for potential bacterial, viral and protozoan pathogens. The levels of indicators were determined throughout the air-drying and storage phases of anaerobically digested sewage sludge. Samples were collected from two wastewater treatment plants (WWTPs) in Victoria, Australia. Established methods were applied for analysis of bacteria and coliphages, based on membrane filtration and layered plates, respectively. In the pan drying phase, the prevalence of Escherichia coli was reduce

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Sinton, Lester W., Robin R. Braithwaite, Carollyn H. Hall, and Margaret L. Mackenzie. "Survival of Indicator and Pathogenic Bacteria in Bovine Feces on Pasture." Applied and Environmental Microbiology 73, no. 24 (October 19, 2007): 7917–25. http://dx.doi.org/10.1128/aem.01620-07.

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ABSTRACT The survival of enteric bacteria was measured in bovine feces on pasture. In each season, 11 cow pats were prepared from a mixture of fresh dairy cattle feces and sampled for up to 150 days. Four pats were analyzed for Escherichia coli, fecal streptococci, and enterococci, and four inoculated pats were analyzed for Campylobacter jejuni and Salmonella enterica. Two pats were placed on drainage collectors, and another pat was fitted with a temperature probe. In the first 1 to 3 weeks, there were increases (up to 1.5 orders of magnitude) in the counts of enterococci (in four seasons), E.

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Zaleski, Kathleen J., Karen L. Josephson, Charles P. Gerba, and Ian L. Pepper. "Potential Regrowth and Recolonization of Salmonellae and Indicators in Biosolids and Biosolid-Amended Soil." Applied and Environmental Microbiology 71, no. 7 (July 2005): 3701–8. http://dx.doi.org/10.1128/aem.71.7.3701-3708.2005.

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ABSTRACT This study evaluated the potential for conversion of Class B to Class A biosolids with respect to salmonellae and fecal coliforms during solar drying in concrete lined drying beds. Anaerobically (8% solids) and aerobically (2% solids) digested Class B biosolids were pumped into field-scale drying beds, and microbial populations and environmental conditions were monitored. Numbers of fecal coliforms and salmonellae decreased as temperature and rate of desiccation increased. After 3 to 4 weeks, Class A requirements were achieved in both biosolids for the pathogens and the indicators. Ho

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Gibbs, R. A., C. J. Hu, G. E. Ho, and I. Unkovich. "Regrowth of faecal coliforms and salmonellae in stored biosolids and soil amended with biosolids." Water Science and Technology 35, no. 11-12 (June 1, 1997): 269–75. http://dx.doi.org/10.2166/wst.1997.0745.

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Stabilised wastewater sludge (biosolids) has beneficial re-use properties but these are limited by the presence of human pathogens. In this study soil amendment with biosolids and storage of biosolids prior to re-use were examined as disposal and treatment options. In a soil amendment trial biosolids were mixed with sandy soil and monitored for 37 weeks. In two storage trials biosolids were stored in piles 1m high and monitored for &lt;60 weeks. Included in the monitoring programme were tests to determine the concentrations of faecal coliforms, faecal streptococci and salmonellae. In both

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Grayer, Dannielle C., and Latania K. Logan. "1004. Cladophora in Lake Michigan May Serve as Important Reservoirs for Antibiotic-Resistant Bacteria." Open Forum Infectious Diseases 8, Supplement_1 (November 1, 2021): S592—S593. http://dx.doi.org/10.1093/ofid/ofab466.1198.

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Abstract Background Cladophora is a green algae, native to the Great Lakes, and found in large quantities along Lake Michigan shorelines. Previous studies have shown that Cladophora provide protection and nutrients for the Enterobacteriaceae (Ent) family, allowing persistence and regrowth. Chicago waterways harbor concerning antibiotic-resistant (AR) Ent, however the community reservoirs are unknown. Our primary objective was to assess whether Cladophora harbor AR Ent and to secondarily assess AR Ent in local beach waters where Cladophora are present. Figure 1. Map of Lake Michigan showing sit

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LAPIDOT, ANAT, and SIMA YARON. "Transfer of Salmonella enterica Serovar Typhimurium from Contaminated Irrigation Water to Parsley Is Dependent on Curli and Cellulose, the Biofilm Matrix Components." Journal of Food Protection 72, no. 3 (March 1, 2009): 618–23. http://dx.doi.org/10.4315/0362-028x-72.3.618.

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Enteric pathogens can contaminate fresh produce, and this contaminated produce can be a significant potential source of human illness. The objective of this study was to determine a possible mode of transfer of Salmonella Typhimurium from contaminated irrigation water to mature parsley plants and to investigate the role of bacterial cellulose and curli. Parsley plants were drip irrigated with water containing green fluorescent protein–labeled Salmonella Typhimurium. Stems and leaves were harvested 1 day after the third irrigation and examined for the presence of Salmonella Typhimurium. Three w

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Mangalappalli-Illathu, Anil K., and Darren R. Korber. "Adaptive Resistance and Differential Protein Expression of Salmonella enterica Serovar Enteritidis Biofilms Exposed to Benzalkonium Chloride." Antimicrobial Agents and Chemotherapy 50, no. 11 (August 28, 2006): 3588–96. http://dx.doi.org/10.1128/aac.00573-06.

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ABSTRACT The development of adaptive resistance of Salmonella enterica serovar Enteritidis ATCC 4931 biofilms following exposure to benzalkonium chloride (BC) either continuously (1 μg ml−1) or intermittently (10 μg ml−1 for 10 min daily) was examined. Biofilms adapted to BC over a 144-h period could survive a normally lethal BC challenge (500 μg ml−1 for 10 min) and then regrow, as determined by increases in biofilm thickness, total biomass, and the ratio of the viable biomass to the nonviable biomass. Exposure of untreated control biofilms to the lethal BC challenge resulted in biofilm erosi

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Tannouri, Abdo, Ziad Rizk, Marina Al Daccache, Chantal Ghanem, Valérie Azzi, Rami Haddad, Richard G. Maroun, Zeina Hobaika, Rebecca Badra, and Dominique Salameh. "Characterization of Antagonist Potential of Selected Compost Bacterial Isolates (CBI) against Plant and Human Pathogens." Agronomy 12, no. 12 (November 27, 2022): 2977. http://dx.doi.org/10.3390/agronomy12122977.

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Several fecal and enteric pathogens are present within the primary organic raw materials that are introduced to compost piles. These pathogens may compete with the existing microbiota and limit their efficiency, yielding only partial decomposition of the final compost. These pathogens also affect the process kinetics and persist in the final compost or may even regrow as a result of the declining effect of indigenous antagonistic micro-organisms. In this work, 11 indigenous bacterial isolates were selected from compost piles that were constructed from different percentages of comingled primary

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Verhougstraete, M. P., M. N. Byappanahalli, J. B. Rose, and R. L. Whitman. "Cladophora in the Great Lakes: impacts on beach water quality and human health." Water Science and Technology 62, no. 1 (July 1, 2010): 68–76. http://dx.doi.org/10.2166/wst.2010.230.

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Cladophora in the Great Lakes grows rapidly during the warm summer months, detaches, and becomes free-floating mats as a result of environmental conditions, eventually becoming stranded on recreational beaches. Cladophora provides protection and nutrients, which allow enteric bacteria such as Escherichia coli, enterococci, Shigella, Campylobacter, and Salmonella to persist and potentially regrow in the presence of the algae. As a result of wind and wave action, these microorganisms can detach and be released to surrounding waters and can influence water quality. Enteric bacterial pathogens hav

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Nale, Janet Y., Gurinder K. Vinner, Viviana C. Lopez, Anisha M. Thanki, Preeda Phothaworn, Parameth Thiennimitr, Angela Garcia, et al. "An Optimized Bacteriophage Cocktail Can Effectively Control Salmonella in vitro and in Galleria mellonella." Frontiers in Microbiology 11 (January 21, 2021). http://dx.doi.org/10.3389/fmicb.2020.609955.

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Salmonella spp. is a leading cause of gastrointestinal enteritis in humans where it is largely contracted via contaminated poultry and pork. Phages can be used to control Salmonella infection in the animals, which could break the cycle of infection before the products are accessible for consumption. Here, the potential of 21 myoviruses and a siphovirus to eliminate Salmonella in vitro and in vivo was examined with the aim of developing a biocontrol strategy to curtail the infection in poultry and swine. Together, the phages targeted the twenty-three poultry and ten swine prevalent Salmonella s

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Lee, Seung-Jin, Elias Gebru Awji, Na-hye Park, and Seung-Chun Park. "Using In Vitro Dynamic Models To Evaluate Fluoroquinolone Activity against Emergence of Resistant Salmonella enterica Serovar Typhimurium." Antimicrobial Agents and Chemotherapy 61, no. 2 (November 28, 2016). http://dx.doi.org/10.1128/aac.01756-16.

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ABSTRACT The objectives of this study were to determine pharmacokinetic/pharmacodynamic (PK/PD) indices of fluoroquinolones that minimize the emergence of resistant Salmonella enterica serovar Typhimurium (S. Typhimurium) using in vitro dynamic models and to establish mechanisms of resistance. Three fluoroquinolones, difloxacin (DIF), enrofloxacin (ENR), and marbofloxacin (MAR), at five dose levels and 3 days of treatment were simulated. Bacterial killing-regrowth kinetics and emergence of resistant bacteria after antibacterial drug exposure were quantified. PK/PD indices associated with diffe

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Ogunniyi, Abiodun D., Catherine E. Dandie, Sergio Ferro, Barbara Hall, Barbara Drigo, Gianluca Brunetti, Henrietta Venter, et al. "Comparative antibacterial activities of neutral electrolyzed oxidizing water and other chlorine-based sanitizers." Scientific Reports 9, no. 1 (December 2019). http://dx.doi.org/10.1038/s41598-019-56248-7.

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AbstractThere is increasing demand for safe and effective sanitizers for irrigation water disinfection to prevent transmission of foodborne pathogens to fresh produce. Here we compared the efficacy of pH-neutral electrolyzed oxidizing water (EOW), sodium hypochlorite (NaClO) and chlorine dioxide (ClO2) against single and mixed populations of E. coli, Listeria and Salmonella under a range of pH and organic matter content. EOW treatment of the mixed bacterial suspension resulted in a dose-dependent (<1 mg/L free chlorine), rapid (<2 min) and effective (4–6 Log10) reduction of the microbial

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Harrand, Anna Sophia, Veronica Guariglia-Oropeza, Jordan Skeens, David Kent, and Martin Wiedmann. "Nature versus Nurture: Assessing the impact of strain diversity and pre-growth conditions on Salmonella enterica, Escherichia coli, and Listeria spp. growth and survival on selected produce items." Applied and Environmental Microbiology, January 4, 2021. http://dx.doi.org/10.1128/aem.01925-20.

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Abstract:

Inoculation studies are important when assessing microbial survival and growth in food products. These studies typically involve the pre-growth of multiple strains of a target pathogen under a single condition; this emphasizes strain diversity. To gain a better understanding of the impacts of strain diversity (“Nature”) and pre-growth conditions (“Nurture”) on subsequent bacterial growth in foods, we assessed the growth and survival of S. enterica (n=5), E. coli (n=6) and Listeria (n=5) inoculated onto tomatoes, pre-cut lettuce and cantaloupe rind, respectively. Pre-growth conditions included

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"Regrowth of faecal coliforms and salmonellae in stored biosolids and soil amended with biosolids." Water Science and Technology 35, no. 11-12 (1997). http://dx.doi.org/10.1016/s0273-1223(97)00271-0.

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