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Escherichia Coli O157 infection

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https://www.readbyqxmd.com/read/29765909/shiga-toxin-producing-escherichia-coli-infection-in-j%C3%A3-nk%C3%A3-ping-county-sweden-occurrence-and-molecular-characteristics-in-correlation-with-clinical-symptoms-and-duration-of-stx-shedding
#1
Xiangning Bai, Sara Mernelius, Cecilia Jernberg, Ing-Marie Einemo, Stefan Monecke, Ralf Ehricht, Sture Löfgren, Andreas Matussek
Shiga toxin-producing Escherichia coli (STEC) cause bloody diarrhea (BD), hemorrhagic colitis (HC), and even hemolytic uremic syndrome (HUS). In Nordic countries, STEC are widely spread and usually associated with gastrointestinal symptoms and HUS. The objective of this study was to investigate the occurrence of STEC in Swedish patients over 10 years of age from 2003 through 2015, and to analyze the correlation of critical STEC virulence factors with clinical symptoms and duration of stx shedding. Diarrheal stool samples were screened for presence of stx by real-time PCR...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29763867/shiga-toxigenic-escherichia-coli-incidence-is-related-to-small-area-variation-in-cattle-density-in-a-region-in-ireland
#2
C Brehony, J Cullinan, M Cormican, D Morris
Shiga toxigenic Escherichia coli (STEC) are pathogenic E. coli that cause infectious diarrhoea. In some cases infection may be complicated by renal failure and death. The incidence of human infection with STEC in Ireland is the highest in Europe. The objective of the study was to examine the spatial incidence of human STEC infection in a region of Ireland with significantly higher rates of STEC incidence than the national average and to identify possible risk factors of STEC incidence at area level. Anonymised laboratory records (n = 379) from 2009 to 2015 were obtained from laboratories serving three counties in the West of Ireland...
May 12, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29752274/molecular-epidemiology-of-shiga-toxin-producing-escherichia-coli-stec-on-new-zealand-dairy-farms-application-of-a-culture-independent-assay-and-whole-genome-sequencing
#3
A Springer Browne, Anne C Midwinter, Helen Withers, Adrian L Cookson, Patrick J Biggs, Jonathan C Marshall, Jackie Benschop, Steve Hathaway, Neville A Haack, Rukhshana N Akhter, Nigel P French
New Zealand has a relatively high incidence of human cases of Shiga toxin-producing Escherichia coli (STEC), with 8.9 STEC cases per 100,000 people reported in 2016. Previous research showed living near cattle and contact with cattle feces as significant risk factors for STEC infections in humans in New Zealand, but infection was not linked to food-associated factors. During the 2014 spring calving season, a random stratified cross-sectional study of dairy farms (n=102) in six regions across New Zealand assessed the prevalence of the 'Top 7' STEC (serogroups O157, O26, O45, O103, O111, O121, O145) in young calves (n=1,508) using a culture-independent diagnostic test (PCR/MALDI-TOF)...
May 11, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29745302/shiga-toxin-producing-escherichia-coli-stec-o157-outbreak-associated-with-likely-transmission-in-an-inflatable-home-paddling-pool-in-england-june-2017
#4
Mtr Pereboom, D Todkill, E Knapper, C Jenkins, J Hawker, N Coetzee
In June 2017, an outbreak of Shiga toxin-producing Escherichia coli (STEC) O157 infection with phage type 21/28 and identical genotypic profiles involving three children from Staffordshire was reported. Two cases developed haemolytic uraemic syndrome (HUS). Person-to-person transmission via a shared inflatable home paddling pool was the most likely route of infection, following contamination by the first case. The source of infection in the first case was not identified. We recommend that individuals experiencing gastroenteritis should not bathe in paddling pools and that water should be changed at frequent intervals throughout the day to minimise the spread of infection...
May 1, 2018: Perspectives in Public Health
https://www.readbyqxmd.com/read/29741154/novel-application-of-the-matched-case-control-design-to-compare-food-supply-chains-during-an-escherichia-coli-o157-outbreak-united-kingdom-2016
#5
Thomas Inns, Paul Cleary, Nick Bundle, Sarah Foulkes, Ashley Sharp, Lara Utsi, Chris McBrien, Rehman Teagle, Alison Waldram, Chris Williams, Cathy McCann, Rob Smith, Sepeedeh Saleh, Noel McCarthy, Roberto Vivancos, Jeremy Hawker, Valerie Decraene
There is a need for innovative methods to investigate outbreaks of food-borne infection linked to produce with a complex distribution network. The investigation of a large outbreak of Escherichia coli O157 PT34 infection in the United Kingdom in 2016 indicated that catering venues associated with multiple cases had used salad leaves sourced from one supplier. Our aim was to investigate whether catering venues linked to cases were more likely to have used salad leaves from this supplier. We conducted a matched case-control study, with catering venues as the units of analysis...
May 2018: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/29740410/growth-and-extended-survival-of-escherichia-coli-o157-h7-in-soil-organic-matter
#6
Gitanjali NandaKafle, Amy A Christie, Sébastien Vilain, Volker S Brözel
Enterohaemorrhagic Escherichia coli , such as serotype O157:H7, are a leading cause of food-associated outbreaks. While the primary reservoir is associated with cattle, plant foods have been associated as sources of human infection. E. coli is able to grow in the tissue of food plants such as spinach. While fecal contamination is the primary suspect, soil has been underestimated as a potential reservoir. Persistence of bacterial populations in open systems is the product of growth, death, predation, and competition...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29702577/genotypic-features-of-clinical-and-bovine-escherichia-coli-o157-strains-isolated-in-countries-with-different-associated-disease-incidences
#7
REVIEW
Luis Pianciola, Marta Rivas
There is great geographical variation in the frequency of Escherichia coli O157 infections that correlates with important differences in the bovine reservoir of each country. Our group carried out a broad molecular characterization of human and bovine E. coli O157 strains circulating in Argentina using different methodologies. Our data allows us to conclude that in Argentina, a high homogeneity is observed in both cattle and human strains, with almost exclusive circulation of strains belonging to the hypervirulent clade 8 described by Manning...
April 27, 2018: Microorganisms
https://www.readbyqxmd.com/read/29683443/detection-of-enterohemorrhagic-escherichia-coli-colonization-in-murine-host-by-non-invasive-in-vivo-bioluminescence-system
#8
Cheng-Ju Kuo, Sin-Tian Wang, Chang-Shi Chen
Enterohemorrhagic E. coli (EHEC) O157:H7, which is a foodborne pathogen that causesdiarrhea, hemorrhagic colitis (HS), and hemolytic uremic syndrome (HUS), colonize to the intestinal tract of humans. To study the detailed mechanism of EHEC colonization in vivo, it is essential to have animal models to monitor and quantify EHEC colonization. We demonstrate here a mouse-EHEC colonization model by transforming the bioluminescent expressing plasmid to EHEC to monitor and quantify EHEC colonization in living hosts...
April 9, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29680695/microbiological-quality-and-antimicrobial-resistance-characterization-of-salmonella-spp-in-fresh-milk-value-chains-in-ghana
#9
Angela Parry-Hanson Kunadu, Mark Holmes, Eric L Miller, Andrew J Grant
Consumer perception of poor hygiene of fresh milk products is a major barrier to promotion of milk consumption as an intervention to alleviate the burden of malnutrition in Ghana. Fresh milk is retailed raw, boiled, or processed into unfermented cheese and spontaneously fermented products in unlicensed outlets. In this study, we have determined microbiological quality of informally retailed fresh milk products and characterized the genomic diversity and antimicrobial resistance (AMR) patterns of non-typhoidal Salmonella (NTS) in implicated products...
April 14, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29655383/hospitalisations-due-to-bacterial-gastroenteritis-a-comparison-of-surveillance-and-hospital-discharge-data
#10
E Scallan, P M Griffin, H Q McLean, B E Mahon
Studies estimating the human health impact of the foodborne disease often include estimates of the number of gastroenteritis hospitalisations. The aims of this study were to examine the degree to which hospital discharge data underreport hospitalisations due to bacterial gastroenteritis and to estimate the frequency of stool sample submission among patients presenting with gastroenteritis. Using linked laboratory and hospital discharge data from a healthcare organisation and its affiliated hospital, we examined the International Classification of Disease (ICD-9-CM) diagnosis codes assigned to hospitalised adults with culture-confirmed Campylobacter, Salmonella, or Escherichia coli O157 infections and determined the frequency of stool sample submission...
April 15, 2018: Epidemiology and Infection
https://www.readbyqxmd.com/read/29624104/characterization-of-bacteriophages-targeting-non-o157-shiga-toxigenic-escherichia-coli
#11
Pushpinder Kaur Litt, Joyjit Saha, Divya Jaroni
Non-O157 Shiga toxigenic Escherichia coli (STEC) are an important group of foodborne pathogens, implicated in several outbreaks and recalls in the past 2 decades. It is therefore crucial to devise effective control strategies against these pathogens. Bacteriophages present an attractive alternative to conventional pathogen control methods in the food industry. Bacteriophages, targeting non-O157 STEC (O26, O45, O103, O111, O121, O145), were isolated from beef cattle operations in Oklahoma. Their host range and lytic ability were determined against several ( n = 21) non-O157 STEC isolates, by using the spot-on-lawn assay...
April 6, 2018: Journal of Food Protection
https://www.readbyqxmd.com/read/29620505/influence-of-rnase-e-deficiency-on-the-production-of-stx2-bearing-phages-and-shiga-toxin-in-an-rnase-e-inducible-strain-of-enterohaemorrhagic-escherichia-coli-ehec-o157-h7
#12
Thujitha Thuraisamy, Patricia B Lodato
PURPOSE: In enterohaemorrhagic Escherichia coli (EHEC), stx1 or stx2 genes encode Shiga toxin (Stx1 or Stx2, respectively) and are carried by prophages. The production and release of both stx phages and toxin occur upon initiation of the phage lytic cycle. Phages can further disseminate stx genes by infecting naïve bacteria in the intestine. Here, the effect of RNase E deficiency on these two virulence traits was investigated. METHODOLOGY: Cultures of the EHEC strains TEA028-rne containing low versus normal RNase E levels or the parental strain (TEA028) were treated with mitomycin C (MMC) to induce the phage lytic cycle...
April 5, 2018: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/29617871/clinical-and-laboratory-predictors-of-shiga-toxin-producing-escherichia-coli-infection-in-children-with-bloody-diarrhea
#13
Ryan S McKee, Phillip I Tarr, Dennis J Dietzen, Rachit Chawla, David Schnadower
Objectives: Children with acute bloody diarrhea are at risk of being infected with Shiga toxin-producing Escherichia coli (STEC) and of progression to hemolytic uremic syndrome. Our objective was to identify clinical and laboratory factors associated with STEC infection in children who present with acute bloody diarrhea. Methods: We performed a prospective cohort study of consecutive children younger than 18 years who presented with acute (<2-week duration) bloody diarrhea between August 1, 2013, and August 1, 2014...
April 2, 2018: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/29593666/factors-involved-in-the-persistence-of-a-shiga-toxin-producing-escherichia-coli-o157-h7-strain-in-bovine-feces-and-gastro-intestinal-content
#14
Audrey Segura, Pauline Auffret, Delphine Bibbal, Marine Bertoni, Alexandra Durand, Grégory Jubelin, Monique Kérourédan, Hubert Brugère, Yolande Bertin, Evelyne Forano
Healthy cattle are the primary reservoir for O157:H7 Shiga toxin-producing E. coli responsible for human food-borne infections. Because farm environment acts as a source of cattle contamination, it is important to better understand the factors controlling the persistence of E. coli O157:H7 outside the bovine gut. The E. coli O157:H7 strain MC2, identified as a persistent strain in French farms, possessed the characteristics required to cause human infections and genetic markers associated with clinical O157:H7 isolates...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29588211/escherichia-coli-o157-h7-virulence-factors-differentially-impact-cattle-and-bison-macrophage-killing-capacity
#15
Robert G Schaut, Crystal L Loving, Vijay K Sharma
Enterohemorrhagic Escherichia coli O157:H7 colonizes the gastrointestinal tract of ruminants, including cattle and bison, which are reservoirs of these zoonotic disease-causing bacteria. Healthy animals colonized by E. coli O157:H7 do not experience clinical symptoms of the disease induced by E. coli O157:H7 infections in humans; however, a variety of host immunological factors may play a role in the amount and frequency of fecal shedding of E. coli O157:H7 by ruminant reservoirs. How gastrointestinal colonization by E...
March 24, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29565841/preliminary-incidence-and-trends-of-infections-with-pathogens-transmitted-commonly-through-food-foodborne-diseases-active-surveillance-network-10-u-s-sites-2006-2017
#16
Ellyn P Marder Mph, Patricia M Griffin, Paul R Cieslak, John Dunn, Sharon Hurd, Rachel Jervis, Sarah Lathrop, Alison Muse, Patricia Ryan, Kirk Smith, Melissa Tobin-D'Angelo, Duc J Vugia, Kristin G Holt, Beverly J Wolpert, Robert Tauxe, Aimee L Geissler
Despite ongoing food safety measures in the United States, foodborne illness continues to be a substantial health burden. The 10 U.S. sites of the Foodborne Diseases Active Surveillance Network (FoodNet)* monitor cases of laboratory-diagnosed infections caused by nine pathogens transmitted commonly through food. This report summarizes preliminary 2017 data and describes changes in incidence since 2006. In 2017, FoodNet reported 24,484 infections, 5,677 hospitalizations, and 122 deaths. Compared with 2014-2016, the 2017 incidence of infections with Campylobacter, Listeria, non-O157 Shiga toxin-producing Escherichia coli (STEC), Yersinia, Vibrio, and Cyclospora increased...
March 23, 2018: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29564631/virulent-gene-profile-and-antibiotic-susceptibility-pattern-of-shiga-toxin-producing-escherichia-coli-stec-from-cattle-and-camels-in-maiduguri-north-eastern-nigeria
#17
Musa Sakuma Adamu, Iniobong Chukwuebuka Ikenna Ugochukwu, Sunday Idoko Idoko, Yakubu Adamu Kwabugge, Nafisatu Sa'ad Abubakar, James Ameh Ameh
Prevalence and distribution of Shiga toxin-producing Escherichia coli (STEC) serogroups from the faecal samples of cattle and camels slaughter in Maiduguri abattoir and their antibiotic resistance profile of the isolates were determined. The highest prevalence (24%) was recorded in the month of September and more STEC isolates came from cattle than the camels. There was significant (P < 0.05) seasonal trend in the prevalence of STEC among cattle and camel with more cases recorded during the wet season...
March 21, 2018: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29555328/blend-of-organic-acids-and-medium-chain-fatty-acids-prevents-the-inflammatory-response-and-intestinal-barrier-dysfunction-in-mice-challenged-with-enterohemorrhagic-escherichia-coli-o157-h7
#18
Jun Wang, JinXin Lu, XiaoWei Xie, Jia Xiong, Ningning Huang, Hongkui Wei, Siwen Jiang, Jian Peng
Impaired epithelial barrier function disrupts immune homeostasis and increases inflammation in intestines, leading to many intestinal diseases. The blend of organic acids (OAs) and medium chain fatty acids (MCFAs) has been shown to have synergistic bactericidal effect. In this study, we demonstrated that two blends of OAs and MCFAs (OM1 and OM2) could prevent the inflammatory response and intestinal barrier dysfunction in enterohemorrhagic Escherichia coli (EHEC)-infected mice. Treatments of OM1 and OM2 significantly reduced the body weight loss and production of IL-6 and TNF-α induced by EHEC...
March 16, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29548291/pathogenic-potential-of-shiga-toxin-producing-escherichia-coli-strains-of-caprine-origin-virulence-genes-shiga-toxin-subtypes-phylogenetic-background-and-clonal-relatedness
#19
Maziar Jajarmi, Mahdi Askari Badouei, Abbas Ali Imani Fooladi, Reza Ghanbarpour, Ali Ahmadi
BACKGROUND: All over the world, Shiga toxin-producing Escherichia coli (STEC) are considered as important zoonotic pathogens. Eight serogroups have the greatest role in the outbreaks and diseases caused by STEC which include O26, O45, O103, O111, O113, O121, O145 and O157. Ruminants, especially cattle are the main reservoirs but the role of small ruminants in the epidemiology of human infections has not been thoroughly assessed in many countries. The objective of this research was to investigate the pathogenic potential of the STEC strains isolated from slaughtered goats...
March 16, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29523817/genetic-diversity-of-the-enterohaemolysin-gene-ehxa-in-non-o157-shiga-toxin-producing-escherichia-coli-strains-in-china
#20
Shanshan Fu, Xiangning Bai, Ruyue Fan, Hui Sun, Yanmei Xu, Yanwen Xiong
Non-O157 Shiga toxin-producing Escherichia coli (STEC) is increasingly recognized as an important enteric foodborne pathogen. The hallmark of the disease is the production of Shiga toxins; however, there are other virulence factors that contribute to the pathogenesis of STEC. This study aimed to investigate the prevalence and genetic diversity of the enterohaemolysin gene, ehxA, among non-O157 STEC strains from human, animal, and food sources. The ehxA gene was amplified from 138 (31.8%) of 434 non-O157 STEC strains, among which 36 unique ehxA sequences were identified...
March 9, 2018: Scientific Reports
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