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Foodborne Pathogens and Disease

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https://www.readbyqxmd.com/read/28103104/characterization-and-molecular-subtyping-of-shiga-toxin-producing-escherichia-coli-strains-in-butcher-shops
#1
Victoria Brusa, Magdalena Costa, Alejandra Londero, Gerardo A Leotta, Lucía Galli
Shiga toxin-producing Escherichia coli (STEC) are important emerging foodborne human pathogens. Ruminants are the main animal reservoir of STEC currently known, and meat can become contaminated at different stages of the production chain. The aim of this work was to subtype and establish the epidemiological relatedness of non-O157 STEC strains isolated from ground beef and the environment in butcher shops before (evaluation stage, 2010-2011 period) and after (verification stage, 2013) implementing improvement actions...
January 19, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28085487/prevalence-virulence-potential-and-antibiotic-susceptibility-profile-of-listeria-monocytogenes-isolated-from-bovine-raw-milk-samples-obtained-from-rajasthan-india
#2
Sanjita Sharma, Vishnu Sharma, Dinesh Kumar Dahiya, Aarif Khan, Manisha Mathur, Amit Sharma
Listeriosis is a serious foodborne disease of a global concern, and can effectively be controlled by a continuous surveillance of the virulent and multidrug-resistant strains of Listeria monocytogenes. This study was planned to investigate prevalence of L. monocytogenes in bovine raw milk samples. A total of 457 raw milk samples collected from 15 major cities in Rajasthan, India, were analyzed for the presence of L. monocytogenes by using standard microbiological and molecular methods. Five of the 457 samples screen tested positive for L...
January 13, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28075607/efficacy-of-an-escherichia-coli-o157-h7-srp-vaccine-in-orally-challenged-goats-and-strain-persistence-over-time
#3
Jacob M Swift, Derek M Foster, Anna T Rogers, Hannah J Sylvester, Emily H Griffith, Megan E Jacob
Small ruminants have been implicated in outbreaks of Escherichia coli O157:H7 at livestock exhibitions throughout the United States. Additionally, goat meat or milk may serve as a reservoir for foodborne transmission of the organism. These associations highlight the public health importance of an effective strategy to reduce E. coli O157:H7 shedding in goats. We examined the efficacy of the SRP(®) vaccine in goats orally challenged with E. coli O157:H7. Mixed-breed goats (n = 14) were randomly allocated into vaccinated and unvaccinated treatments (n = 7 per treatment)...
January 11, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28072925/impact-of-low-and-high-doses-of-marbofloxacin-on-the-selection-of-resistant-enterobacteriaceae-in-the-commensal-gut-flora-of-young-cattle-discussion-of-data-from-2-study-populations
#4
Guillaume Lhermie, Véronique Dupouy, Farid El Garch, Nadine Ravinet, Pierre-Louis Toutain, Alain Bousquet-Mélou, Henri Seegers, Sébastien Assié
In the context of requested decrease of antimicrobial use in veterinary medicine, our objective was to assess the impact of two doses of marbofloxacin administered on young bulls (YBs) and veal calves (VCs) treated for bovine respiratory disease, on the total population of Enterobacteriaceae in gut flora and on the emergence of resistant Enterobacteriaceae. In two independent experiments, 48 YBs from 6 commercial farms and 33 VCs previously colostrum deprived and exposed to cefquinome were randomly assigned to one of the three groups LOW, HIGH, and Control...
January 10, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28072918/production-of-staphylococcal-enterotoxins-d-and-r-in-milk-and-meat-juice-by-staphylococcus-aureus-strains
#5
Justyna Schubert, Magdalena Podkowik, Jarosław Bystroń, Jacek Bania
Seventeen Staphylococcus aureus strains were tested for production of staphylococcal enterotoxin D (SED) and staphylococcal enterotoxin R (SER) in milk and meat juice. SED was secreted in milk by 12 S. aureus strains at 6-54 ng/mL at 24 h and 9-98 ng/mL at 48 h. Another five strains secreted SED at 0.9-1.9 μg/mL at 24 h and at 1.2-2.4 μg/mL at 48 h. Strains producing high levels of SED in milk secreted 77-666 μg/mL of SED in meat juice at 24 h and 132-1225 μg/mL at 48 h. Strains producing lower amounts of SED in milk secreted 228-1109 ng/mL of SED at 24 h and 377-1782 ng/mL at 48 h in meat juice...
January 10, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28072914/presence-of-pathogenic-rickettsiae-and-protozoan-in-samples-of-raw-milk-from-cows-goats-and-sheep
#6
Ewa Cisak, Violetta Zając, Jacek Sroka, Anna Sawczyn, Anna Kloc, Jacek Dutkiewicz, Angelina Wójcik-Fatla
OBJECTIVE: The aim of the present work was to determine the presence of various rickettsiae and protozoan in raw milk and the assessment the potential, milk-borne route in the spread of selected zoonotic pathogens. MATERIALS: A total of 119 raw milk samples collected randomly from 63 cows, 29 goats, and 27 sheep bred on 34 farms situated on eight communities in eastern Poland were examined by polymerase chain reaction (PCR) method for the presence of pathogenic rickettsiae (Coxiella burnetii, Anaplasma phagocytophilum, and Rickettsia spp...
January 10, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28067541/listeria-monocytogenes-circulating-in-rabbit-meat-products-and-slaughterhouses-in-italy-prevalence-data-and-comparison-among-typing-results
#7
Alessandra De Cesare, Antonio Parisi, Renzo Mioni, Damiano Comin, Alex Lucchi, Gerardo Manfreda
Rabbit meat has outstanding dietetic and nutritional properties. However, few data on microbiological hazards associated with rabbit productions are available. In this study, the presence of Listeria monocytogenes was determined in 430 rabbit carcasses, 256 rabbit meat cuts and products, and 599 environmental sponges collected from four Italian rabbit slaughterhouses over a period of 1 year. Prevalence of L. monocytogenes among the 1285 rabbit meat and environmental samples was 11%, with statistically significant differences between slaughterhouses...
January 9, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28051328/a-single-step-enrichment-medium-for-nonchromogenic-isolation-of-healthy-and-cold-injured-salmonella-spp-from-fresh-vegetables
#8
Hong-Seok Kim, Dasom Choi, Il-Byeong Kang, Dong-Hyeon Kim, Jin-Hyeok Yim, Young-Ji Kim, Jung-Whan Chon, Deog-Hwan Oh, Kun-Ho Seo
Culture-based detection of nontyphoidal Salmonella spp. in foods requires at least four working days; therefore, new detection methods that shorten the test time are needed. In this study, we developed a novel single-step Salmonella enrichment broth, SSE-1, and compared its detection capability with that of commercial single-step ONE broth-Salmonella (OBS) medium and a conventional two-step enrichment method using buffered peptone water and Rappaport-Vassiliadis soy broth (BPW-RVS). Minimally processed lettuce samples were artificially inoculated with low levels of healthy and cold-injured Salmonella Enteritidis (10(0) or 10(1) colony-forming unit/25 g), incubated in OBS, BPW-RVS, and SSE-1 broths, and streaked on xylose lysine deoxycholate (XLD) agar...
January 4, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28045552/factors-influencing-knowledge-food-safety-practices-and-food-preferences-during-warm-weather-of-salmonella-and-campylobacter-cases-in-south-australia
#9
Adriana Milazzo, Lynne C Giles, Ying Zhang, Ann P Koehler, Janet E Hiller, Peng Bi
OBJECTIVE: To assess food safety practices, food shopping preferences, and eating behaviors of people diagnosed with Salmonella or Campylobacter infection in the warm seasons, and to identify socioeconomic factors associated with behavior and practices. METHODS: A cross-sectional survey was conducted among Salmonella and Campylobacter cases with onset of illness from January 1 to March 31, 2013. Multivariable logistic regression analyses examined relationships between socioeconomic position and food safety knowledge and practices, shopping and food preferences, and preferences, perceptions, and knowledge about food safety information on warm days...
January 3, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/27992253/farm-fairs-and-petting-zoos-a-review-of-animal-contact-as-a-source-of-zoonotic-enteric-disease
#10
Cheyenne C Conrad, Kim Stanford, Claudia Narvaez-Bravo, Todd Callaway, Tim McAllister
Many public venues such as farms, fairs, and petting zoos encourage animal contact for both educational and entertainment purposes. However, healthy farm animals, including cattle, small ruminants, and poultry, can be reservoirs for enteric zoonotic pathogens, with human infections resulting in nausea, vomiting, diarrhea, and, in some cases, severe complications that can lead to death. As animals shed these organisms in their feces, contamination of themselves and their surroundings is unavoidable. The majority of North Americans reside in urban and suburban settings, and the general public often possess limited knowledge of agricultural practices and minimal contact with farm animals...
December 19, 2016: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/27982698/salmonella-enterica-serotype-napoli-is-the-first-cause-of-invasive-nontyphoidal-salmonellosis-in-lombardy-italy-2010-2014-and-belongs-to-typhi-subclade
#11
Pol Huedo, Maria Gori, Anna Zolin, Ettore Amato, Giulia Ciceri, Anna Bossi, Mirella Pontello
Salmonella enterica serotype Napoli (S. Napoli) is currently emerging in Europe and particularly in Italy, where in 2014 it caused a large outbreak associated with elevated rates of bacteremia. However, no study has yet investigated its invasive ability and phylogenetic classification. Here, we show that between 2010 and 2014, S. Napoli was the first cause of invasive salmonellosis affecting 40 cases out of 687 (invasive index: 5.8%), which is significantly higher than the invasive index of all the other nontyphoidal serotypes (2...
December 16, 2016: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/27922763/antimicrobial-resistance-in-nontyphoidal-salmonella-isolated-from-human-and-poultry-related-samples-in-brazil-20-year-meta-analysis
#12
Daiane Voss-Rech, Luciana Potter, Clarissa Silveira Luiz Vaz, Daniela Isabel Brayer Pereira, Luís Antonio Sangioni, Águeda Castagna Vargas, Sônia de Avila Botton
Nontyphoidal Salmonella are one of the leading causes of foodborne diseases in the world. As poultry products are recognized as main sources of human salmonellosis, nontyphoidal Salmonella control has become a global issue for the poultry industry. The increasing antimicrobial resistance in poultry-related nontyphoidal Salmonella serovars is a global matter of concern. By monitoring the evolution of antimicrobial resistance, alternative treatments can be identified and possible restrictions in the treatment of systemic human salmonellosis foreseen...
December 6, 2016: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/27893287/hepatitis-e-virus-in-wild-boar-in-northwest-poland-sensitivity-of-methods-of-detection
#13
Samart Dorn-In, Karin Schwaiger, Magdalena Twarużek, Jan Grajewski, Christoph Gottschalk, Manfred Gareis
In northwest Poland, 163 blood and 53 fecal samples of wild boars were collected in winter 2012/13 and 2013/14. All blood samples were tested for the presence of hepatitis E virus (HEV) ribonucleic acid (RNA) by two reverse transcription-polymerase chain reaction (RT-PCR) based methods and by anti-HEV IgG enzyme-linked immunosorbent assay (ELISA). About 17.2% of blood samples were seropositive. One-step nested RT-PCR turned out to be too insensitive (11.6% were positive). Therefore a two-step nested RT-PCR was applied where 25...
November 28, 2016: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/27870554/occurrence-of-extended-spectrum-%C3%AE-lactamases-plasmid-mediated-quinolone-resistance-and-disinfectant-resistance-genes-in-escherichia-coli-isolated-from-ready-to-eat-meat-products
#14
Lili Li, Lei Ye, Sofie Kromann, Hecheng Meng
There are growing concerns about the coselection of resistance against antibiotics and disinfectants in bacterial pathogens. The aim of this study was to characterize the antimicrobial susceptibility profiles, the prevalence of extended-spectrum β-lactamases (ESBLs), plasmid-mediated quinolone resistance genes (PMQRs), and quaternary ammonium compound resistance genes (QACs) in Escherichia coli isolated from ready-to-eat (RTE) meat products obtained in Guangzhou, China, and to determine whether these genes were colocalized in the isolates...
November 21, 2016: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/27860517/ceftriaxone-resistant-nontyphoidal-salmonella-from-humans-retail-meats-and-food-animals-in-the-united-states-1996-2013
#15
Martha Iwamoto, Jared Reynolds, Beth E Karp, Heather Tate, Paula J Fedorka-Cray, Jodie R Plumblee, Robert M Hoekstra, Jean M Whichard, Barbara E Mahon
BACKGROUND: Ceftriaxone resistance in Salmonella is a serious public health threat. Ceftriaxone is commonly used to treat severe Salmonella infections, especially in children. Identifying the sources and drivers of ceftriaxone resistance among nontyphoidal Salmonella is crucial. MATERIALS AND METHODS: The National Antimicrobial Resistance Monitoring System (NARMS) tracks antimicrobial resistance in foodborne and other enteric bacteria from humans, retail meats, and food animals...
November 18, 2016: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/27854542/antimicrobial-resistance-of-campylobacter-species-isolated-from-broilers-in-live-bird-markets-in-shanghai-china
#16
Beibei Li, Licai Ma, Yingli Li, Haiyan Jia, Jianchao Wei, Donghua Shao, Ke Liu, Yuanyuan Shi, Yafeng Qiu, Zhiyong Ma
This study was conducted to determine the prevalence of antimicrobial resistance in Campylobacter spp. isolates from broilers in live bird markets (LBMs). A total of 209 Campylobacter spp. isolates (84 Campylobacter jejuni; 125 Campylobacter coli) were recovered from 364 broiler cecum samples collected from five LBMs in Shanghai, China. Minimum inhibitory concentrations of 13 antimicrobials were determined using agar dilution method. More than 96% of the Campylobacter spp. isolates were resistant to quinolones and tetracyclines...
November 17, 2016: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/27841937/biocide-tolerance-and-antibiotic-resistance-in-salmonella-isolates-from-hen-eggshells
#17
Maria Luisa Fernández Márquez, María José Grande Burgos, Rubén Pérez Pulido, Antonio Gálvez, Rosario Lucas López
The aim of the present study was to determine biocide tolerance and antibiotic resistance in Salmonella isolates from hen eggshells. A total of 39 isolates from hen eggshells, identified as either Salmonella spp. or Salmonella enterica according to 16S rDNA sequencing, were selected for biocide tolerance. Isolates with minimum inhibitory concentrations (MICs) above the wild-type MICs were considered to be biocide tolerant: benzalkonium chloride (BC, 7.7%), cetrimide (CT, 7.7%), hexadecylpyridinium chloride (HDP, 10...
November 14, 2016: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/27792449/longitudinal-monitoring-of-successive-commercial-layer-flocks-for-salmonella-enterica-serovar-enteritidis
#18
Thomas N Denagamage, Paul Patterson, Eva Wallner-Pendleton, Darrell Trampel, Nikki Shariat, Edward G Dudley, Bhushan M Jayarao, Subhashinie Kariyawasam
The Pennsylvania Egg Quality Assurance Program (EQAP) provided the framework for Salmonella Enteritidis (SE) control programs, including the Food and Drug Administration (FDA) mandated Final Egg Rule, for commercial layer facilities throughout the United States. Although flocks with ≥3000 birds must comply with the FDA Final Egg Rule, smaller flocks are exempted from the rule. As a result, eggs produced by small layer flocks may pose a greater public health risk than those from larger flocks. It is also unknown if the EQAPs developed with large flocks in mind are suitable for small- and medium-sized flocks...
October 28, 2016: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/27792397/molecular-typing-and-virulence-gene-profiles-of-enterotoxin-gene-cluster-egc-positive-staphylococcus-aureus-isolates-obtained-from-various-food-and-clinical-specimens
#19
Minghui Song, Chunlei Shi, Xuebing Xu, Xianming Shi
The enterotoxin gene cluster (egc) has been proposed to contribute to the Staphylococcus aureus colonization, which highlights the need to evaluate genetic diversity and virulence gene profiles of the egc-positive population. Here, a total of 43 egc-positive isolates (16.2%) were identified from 266 S. aureus isolates that were obtained from various food and clinical specimens in Shanghai. Seven different egc profiles were found based on the polymerase chain reaction (PCR) result for egc genes. Then, these 43 egc-positive isolates were further typed by multilocus sequence typing, pulsed-field gel electrophoresis (PFGE), multiple-locus variable-number tandem-repeat analysis (MLVA), and accessory gene regulatory (agr) typing...
October 28, 2016: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/27982711/production-of-bacterial-ghosts-from-gram-positive-pathogen-listeria-monocytogenes
#20
Xueyou Wu, Xingrong Ju, Lihui Du, Jian Yuan, Lifeng Wang, Rong He, Zhengxing Chen
INTRODUCTION: The Gram-positive bacterium Listeria monocytogenes is a ubiquitous intracellular pathogen, which has been implicated within the past decade as the causative organism in several outbreaks of foodborne disease. Bacterial ghosts (BGs) are nonliving and vacant cell envelopes of bacteria generated by releasing the bacterial cytoplasm through a channel in the cell envelope. This study attempted to produce Gram-positive pathogenic L. monocytogenes ghosts (LMGs) with simple chemicals...
January 2017: Foodborne Pathogens and Disease
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