نتایج جستجو برای: stec

تعداد نتایج: 1359  

2013
Kevin J. Allen Chad R. Laing Ana Cancarevic Yongxiang Zhang Lili R. Mesak Hai Xu Ana Paccagnella Victor P. J. Gannon Linda Hoang

Shiga toxin-producing Escherichia coli (STEC) are significant public health threats. Although STEC O157 are recognized foodborne pathogens, non-O157 STEC are also important causes of human disease. We characterized 10 O157:H7 and 15 non-O157 clinical STEC derived from British Columbia (BC). Eae, hlyA, and stx were more frequently observed in STEC O157, and 80 and 100% of isolates possessed stx₁...

2015
Julia Doulgere Benjamin Otto Maher Nassour Gerrit Wolters-Eisfeld Holger Rohde Tim Magnus Christoph Wagener Thomas Streichert

OBJECTIVES To investigate whether the adherens junction protein vascular endothelial cadherin (VE-cadherin) is released during Shiga toxin 2 producing Escherichia coli (STEC) infection with haemolytic uraemic syndrome (HUS) and thus could be used to assist diagnosis. DESIGN Using data from the large 2011 STEC outbreak in northern Europe, we determined VE-cadherin plasma concentrations in 356 ...

Journal: :Applied and environmental microbiology 2011
Yoen Ju Park Jinru Chen

Some Shiga toxin-producing Escherichia coli (STEC) strains produce extracellular cellulose, a long polymer of glucose with β-1-4 glycosidic bonds. This study evaluated the efficacies of selected enzymatic and chemical treatments in inactivating STEC and degrading/removing the cellulose on STEC surfaces. Six cellulose-producing STEC strains were treated with cellulase (0.51 to 3.83 U/15 ml), ace...

Journal: :Applied and environmental microbiology 2008
Evelyn A Dean-Nystrom William C Stoffregen Brad T Bosworth Harley W Moon Joachim F Pohlenz

Weaned 3- to 4-month-old calves were fasted for 48 h, inoculated with 10(10) CFU of Shiga toxin-positive Escherichia coli (STEC) O157:H7 strain 86-24 (STEC O157) or STEC O91:H21 strain B2F1 (STEC O91), Shiga toxin-negative E. coli O157:H7 strain 87-23 (Stx(-) O157), or a nonpathogenic control E. coli strain, necropsied 4 days postinoculation, and examined bacteriologically and histologically. S...

Journal: :PloS one 2016
Raies A Mir Thomas A Weppelmann Mauricio Elzo Soohyoun Ahn J Danny Driver KwangCheol Casey Jeong

Each year Shiga toxin-producing Escherichia coli (STEC) are responsible for 2.8 million acute illnesses around the world and > 250,000 cases in the US. Lowering the prevalence of this pathogen in animal reservoirs has the potential to reduce STEC outbreaks in humans by controlling its entrance into the food chain. However, factors that modulate the colonization and persistence of STEC in beef c...

2018
Su-Bin Hwang Jung-Gu Choi Shuai Wei Byung-Jae Park Ramachandran Chelliah Deog-Hwan Oh

Shiga toxin-producing Escherichia coli (STEC) strains are the main cause of bacillary dysentery, although STEC strains generally induce milder disease symptoms compared to Shigella species. This study aimed to determine the virulence of STEC using the nematode Caenorhabditis elegans as a model host. Worm killing, fertility and bacterial colonisation assays were performed to examine the potentia...

2016
Xiangning Bai Wang Zhang Xinyuan Tang Youquan Xin Yanmei Xu Hui Sun Xuelian Luo Ji Pu Jianguo Xu Yanwen Xiong Shan Lu

Shiga toxin-producing Escherichia coli (STEC) are an emerging group of zoonotic pathogens. Ruminants are the natural reservoir of STEC. In this study we determined the prevalence and characteristics of the STEC in plateau pika (Ochotona curzoniae) on the Qinghai-Tibetan Plateau, China. A total of 1116 pika samples, including 294 intestinal contents samples, 317 fecal samples, and 505 intestinal...

2013
Danica Baines Stephanie Erb

BACKGROUND In the less-sensitive mouse model, Shiga toxin-producing Escherichia coli (STEC) challenges result in shedding that reflect the amount of infection and the expression of virulence factors such as Shiga toxins (Stx). The purpose of this study was to characterize the contribution of STEC diversity and Stx expression to shedding in beef feeder calves and to evaluate the effectiveness of...

Journal: :Journal of food protection 2016
Zachary R Stromberg Gentry L Lewis Rodney A Moxley

The isolation and quantification of non-O157 Shiga toxin-producing Escherichia coli (STEC) from cattle feces are challenging. The primary objective of this study was to evaluate the performance of selected agar media in an attempt to identify an optimal medium for the detection and quantification of non-O157 STEC in cattle feces. Comparison studies were performed using CHROMagar STEC, Possé dif...

Journal: :Applied and environmental microbiology 1997
L Beutin D Geier S Zimmermann S Aleksic H A Gillespie T S Whittam

Two separate animal populations consisting of a herd of cattle (19 animals) and a flock of sheep (25 animals) were investigated for strains of Escherichia coli producing Shiga toxins (STEC) over a time period of 6 months. Thirty-three STEC were isolated from 63.2% of cattle and grouped into 11 serotypes and eight electrophoretic types (ETs) by multilocus enzyme analysis. In sheep, 88% of the an...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید