نتایج جستجو برای: stec

تعداد نتایج: 1359  

2018
June Bong Lee Dalmuri Han Hyung Tae Lee Seon Mi Wi Jeong Hoon Park Jung-woo Jo Young-Jae Cho Tae-Wook Hahn Sunjin Lee Byunghak Kang Hyo Sun Kwak Jonghyun Kim Jang Won Yoon

Herein, we report the pathogenic and phylogenetic characteristics of seven Shiga toxin (Stx)-producing Escherichia coli (STEC) isolates from 434 retail meats collected in Korea during 2006 to 2012. The experimental analyses revealed that all isolates (i) were identified as non-O157 STEC, including O91:H14 (3 isolates), O121:H10 (2 isolates), O91:H21 (1 isolate), and O18:H20 (1 isolate), (ii) ca...

Journal: :Applied and environmental microbiology 2013
Wenting Ju Jinling Shen Magaly Toro Shaohua Zhao Jianghong Meng

Pathogenicity islands (PAIs) play an important role in Shiga toxin-producing Escherichia coli (STEC) pathogenicity. The distribution of PAIs OI-122, OI-43/48, and OI-57 and a high-pathogenicity island (HPI) were determined among 98 STEC strains assigned to seropathotypes (SPTs) A to E. PCR and PCR-restriction fragment length polymorphism assays were used to identify 14 virulence genes that belo...

Journal: :Applied and environmental microbiology 2011
Stephanie M Brandt Nicola King Angela J Cornelius Aruni Premaratne Thomas E Besser Stephen L W On

Shiga toxin-producing Escherichia coli (STEC) is a zoonotic pathogen that causes diarrheal disease in humans and is of public health concern because of its ability to cause outbreaks and severe disease such as hemorrhagic colitis or hemolytic-uremic syndrome. More than 400 serotypes of STEC have been implicated in outbreaks and sporadic human disease. The aim of this study was to develop a PCR ...

Journal: :Microbiology spectrum 2014
Peter Feng

Produce contains high levels of mixed microflora, including coliforms and Escherichia coli, but occasionally pathogens may also be present. Enterotoxigenic E. coli and Shigatoxin-producing E. coli (STEC) have been isolated from various produce types, especially spinach. The presence of STEC in produce is easily detected by PCR for the Shiga toxin (Stx) gene, stx, but this is insufficient for ri...

Journal: :Infection and immunity 2013
Elizabeth Gerhardt Mariana Masso Adrienne W Paton James C Paton Elsa Zotta Cristina Ibarra

Shiga toxin-producing Escherichia coli O157:H7 (STEC) is by far the most prevalent serotype associated with hemolytic uremic syndrome (HUS) although many non-O157 STEC strains have been also isolated from patients with HUS. The main virulence factor of STEC is the Shiga toxin type 2 (Stx2) present in O157 and non-O157 strains. Recently, another toxin, named subtilase cytotoxin (SubAB), has been...

Journal: :Journal of medical microbiology 2011
C A Contreras T J Ochoa J Ruiz D W Lacher F P Rivera Y Saenz E Chea-Woo N Zavaleta A I Gil C F Lanata L Huicho R C Maves C Torres C Debroy T G Cleary

The aim of this study was to determine the prevalence, virulence factors (stx, eae, ehxA and astA) and phylogenetic relationships [PFGE and multilocus sequence typing (MLST)] of Shiga toxin-producing Escherichia coli (STEC) strains isolated from four previous cohort studies in 2212 Peruvian children aged <36 months. STEC prevalence was 0.4 % (14/3219) in diarrhoeal and 0.6 % (15/2695) in contro...

Journal: :Infection and immunity 2014
David Montero Paz Orellana Daniela Gutiérrez Daniela Araya Juan Carlos Salazar Valeria Prado Angel Oñate Felipe Del Canto Roberto Vidal

Shiga-toxin producing Escherichia coli (STEC) is the etiologic agent of acute diarrhea, dysentery, and hemolytic-uremic syndrome (HUS). There is no approved vaccine for STEC infection in humans, and antibiotic use is contraindicated, as it promotes Shiga toxin production. In order to identify STEC-associated antigens and immunogenic proteins, outer membrane proteins (OMPs) were extracted from S...

Journal: :Journal of applied microbiology 2016
G-H Kim P Fratamico F Breidt D-H Oh

AIMS The aim of this research was to determine the ability of non-O157 Shiga toxin-producing Escherichia coli (STEC) serogroups to survive with exposure to synthetic gastric fluid (SGF) after adaptation to pineapple juice (PJ) at room and refrigerated temperatures compared to E. coli O157:H7 and to examine the relative transcriptional expression of acid resistance (AR) genes, rpoS, gadA and adi...

2015
Rebecca L. Lindsey Kristen Knipe Lori Rowe Lisley Garcia-Toledo Vladimir Loparev Phalasy Juieng Eija Trees Nancy Strockbine Devon Stripling Peter Gerner-Smidt

Shiga toxin-producing Escherichia coli (STEC) is an important foodborne pathogen. Here, we report complete whole-genome sequences for two STEC strains of serotypes O119:H4 and O165:H25 isolated from clinical cases in the United States.

2017
Lisa Fierz Nicole Cernela Elisabeth Hauser Magdalena Nüesch-Inderbinen Roger Stephan

Objectives: The aim of this study was to characterize a collection of 95 Shigatoxin-producing E.coli (STEC) isolated from human patients in Switzerland during 2010-2014. Methods: We performed O and H serotyping and molecular subtyping. Results: The five most common serogroups were O157, O145, O26, O103, and O146. Of the 95 strains, 35 (36.8%) carried stx1 genes only, 43 strains (45.2%) carried ...

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