نتایج جستجو برای: stec

تعداد نتایج: 1359  

Journal: :Journal of microbiology and biotechnology 2013
Jung-Beom Kim Kyung-Hwan Oh Mi-Sun Park Seung-Hak Cho

Seventy-four Shiga toxin-producing Escherichia coli (STEC) isolates belonging to the serotype O91:H21 were isolated from 1,643 asymptomatic human carriers in a STEC outbreak at Gwangju in Korea. Although the isolates did not cause any symptoms, all of them produced Shiga toxins 1 (Stx1) and 2 (Stx2). In order to determine why these strains cause no symptoms, we explored the differences in virul...

2010
Andrea Menrath Lothar H Wieler Katrin Heidemanns Torsten Semmler Angelika Fruth Nicole Kemper

BACKGROUND Shiga toxin producing Escherichia coli (STEC) are an important cause of human gastro-enteritis and extraintestinal sequelae, with ruminants, especially cattle, as the major source of infection and reservoir. In this study, the fecal STEC shedding of 133 dairy cows was analyzed over a period of twelve months by monthly sampling with the aim to investigate shedding patterns and risk fa...

Journal: :Infection and immunity 2001
M Ogawa K Shimizu K Nomoto M Takahashi M Watanuki R Tanaka T Tanaka T Hamabata S Yamasaki Y Takeda

We examined colonization patterns of Shiga toxin-producing Escherichia coli (STEC), concentrations of Shiga toxins (Stxs) and specific immunoglobulin A (lgA) against Stxs and STEC bacterial cell surface antigen in various portions of the gastrointestinal tract in an infant rabbit infection model. After inoculation of 3-day-old infant rabbits with STEC strain 89020087 at low doses (approximately...

2017
Victoria Brusa Viviana Restovich Lucía Galli David Teitelbaum Marcelo Signorini Hebe Brasesco Alejandra Londero Diego García Nora Lía Padola Valeria Superno Marcelo Sanz Sandra Petroli Magdalena Costa Mariana Bruzzone Adriana Sucari Marcela Ferreghini Luciano Linares Germán Suberbie Ricardo Rodríguez Gerardo A Leotta

Several foods contaminated with Shiga toxin-producing Escherichia coli (STEC) are associated with human diseases. Some countries have established microbiological criteria for non-O157 STEC, thus, the absence of serogroups O26, O45, O103, O104, O111, O121, and O145 in sprouts from the European Union or ground beef and beef trimmings from the United States is mandatory. While in Argentina screeni...

Journal: :Infection and immunity 2002
Mark P Stevens Pauline M van Diemen Gad Frankel Alan D Phillips Timothy S Wallis

Shiga toxin-producing Escherichia coli (STEC) comprises a broad group of bacteria, some of which cause attaching and effacing (AE) lesions and enteritis in animals and humans. Non-O157 STEC serotypes contain a gene (efa1) that mediates attachment to cultured epithelial cells. An almost-identical gene in enteropathogenic E. coli (lifA) encodes lymphostatin, which inhibits the proliferation of mi...

Journal: :The Journal of infectious diseases 2002
Alexander W Friedrich Martina Bielaszewska Wen-Lan Zhang Matthias Pulz Thorsten Kuczius Andrea Ammon Helge Karch

Shiga toxin (Stx)-producing Escherichia coli (STEC) from patients with hemolytic-uremic syndrome (HUS), patients with diarrhea without HUS, or asymptomatic subjects were genotyped to assess associations between stx2 variants and clinical manifestations of infection. Neither stx2d nor stx2e was found in 268 STEC isolates from patients with HUS. Of 262 STEC isolates from patients with diarrhea, s...

2013
Guojie Cao Wenting Ju Lydia Rump Shaohua Zhao Likou Zou Charles Wang Errol Strain Yan Luo Ruth Timme Marc Allard Eric Brown Jianghong Meng

Shiga toxin-producing Escherichia coli (STEC) causes severe illness in humans, including hemorrhagic colitis and hemolytic uremic syndrome. A parallel evolutionary model was proposed in which E. coli strains of distinct phylogenies independently integrate Shiga toxin-encoding genes and evolve into STEC. We report the draft genomes of two emerging non-O157 STEC strains.

2016
Tomoko Morita-Ishihara Sunao Iyoda Atsushi Iguchi Makoto Ohnishi

To evaluate the potential public health risk caused by secondary Shiga toxin-producing Escherichia coli (STEC) infections in Japan, we investigated the prevalence and characteristics of STEC isolated from healthy adults during 2010-2012. Although prevalence among healthy adults was high, most STEC organisms displayed characteristics rarely found in isolates from symptomatic patients.

Journal: :Molecular and cellular probes 1999
V K Sharma E A Dean-Nystrom T A Casey

Semi-automated detection of Enterohaemorrhagic Escherichia coli (EHEC) O157:H7 and non-O157:H7 Shiga toxin-producing E. coli (STEC) was achieved using fluorogenic polymerase chain reaction (PCR). These PCR assays were designed to amplify 80, 120 and 150 bp regions of virulence genes stx1, stx2 and eaeA, respectively, using specific primers. The fluorogenic probes were used for specific detectio...

2017
Bettina Wöchtl Florian Gunzer Wilhelm Gerner Hagen Gasse Michaela Koch Zoltán Bagó Martin Ganter Herbert Weissenböck Nora Dinhopl Sina M Coldewey Alexandra von Altrock Karl-Heinz Waldmann Armin Saalmüller Kurt Zimmermann Jörg Steinmann Jan Kehrmann Ludger Klein-Hitpass Jochen Blom Ralf Ehricht Ines Engelmann Isabel Hennig-Pauka

BACKGROUND Shiga toxin (Stx) producing Escherichia coli (E. coli) (STEC) is the most frequent cause of diarrhoea-positive haemolytic uraemic syndrome (D + HUS) in humans. In 2011, a huge outbreak with an STEC O104:H4 strain in Germany highlighted the limited possibilities for causative treatment of this syndrome. The responsible STEC strain was found to combine Stx production with adherence mec...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید