نتایج جستجو برای: ecoli o157

تعداد نتایج: 6123  

Journal: :Foods 2023

The objective of this work was to molecularly and genotypically characterize test the inhibitory activity six colicinogenic Escherichia coli strains (ColEc) their partially purified colicins against STEC O157:H7 isolated from clinical human cases. Inhibition tests demonstrated these O157:H7. By PCR it possible detect Ia, E7, B microcins M, H47, C7, J25. genome sequencing two selected ColEc stra...

2009

g 272486 t 269978 t 269979 nc O55/O157 rec01 t CB9615 ++ t g g t g g g t g g a 272489 c 269981 c 269982 nc O55/O157 rec01 c CB9615 ++ c a a c a a a c a a g 272507 c 269999 c 270000 nc O55/O157 rec01 c CB9615 ++ c g g g g g g c g g c 272519 t 270011 t 270012 nc O55/O157 rec01 c O157 ++++ c c c c c c c t c c t 272540 c 270032 c 270033 nc O55/O157 rec01 c CB9615 + g c t t c t t c c g t 272550 c 27...

ژورنال: پژوهش در پزشکی 2015

Aim and Background: By Attention to gene sequence and each amino acid codon in host which express protein, also in order to probable vaccine production against influenza A, a major cause of mortality in a year,this research was carried out. M2 protein is conserved and it can be a proper candidate vaccine for influenza infection. Materials and Methods: Present research was an experimental study....

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده دامپزشکی 1392

اشریشیاکولی o157:h7 یکی از معمول ترین سروتیپ های گروه اشریشیاکولی های انتروهموراژیک می باشد که تحت عنوان ارگانیسم انتروهموراژیک یا تولید کننده وروتوکسین یا تولیدکننده توکسین شناخته می شود. حیوانات اهلی و وحشی منبع اشریشیاکولی o157 می باشند، اما نشخوارکنندگان به خصوص گاو به عنوان مخزن طبیعی اصلی مورد توجه می باشند. در کشورهای توسعه یافته، سروتیپ o157:h7، از عوامل اصلی ایجاد درگیری در انسان می با...

Journal: :Clinical and vaccine immunology : CVI 2006
Mark A Hoffman Christian Menge Thomas A Casey William Laegreid Brad T Bosworth Evelyn A Dean-Nystrom

Although cattle develop humoral immune responses to Shiga-toxigenic (Stx+) Escherichia coli O157:H7, infections often result in long-term shedding of these human pathogenic bacteria. The objective of this study was to compare humoral and cellular immune responses to Stx+ and Stx- E. coli O157:H7. Three groups of calves were inoculated intrarumenally, twice in a 3-week interval, with different s...

Journal: :Applied and environmental microbiology 2009
István Tóth Herbert Schmidt Gábor Kardos Zsuzsanna Lancz Kristina Creuzburg Ivelina Damjanova Judit Pászti Lothar Beutin Béla Nagy

Characterization of an Escherichia coli O157 strain collection (n = 42) derived from healthy Hungarian cattle revealed the existence of diverse pathotypes. Enteropathogenic E. coli (EPEC; eae positive) appeared to be the most frequent pathotype (n = 22 strains), 11 O157 strains were typical enterohemorrhagic E. coli (EHEC; stx and eae positive), and 9 O157 strains were atypical, with none of th...

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...

Journal: :The Science of the total environment 2014
Jincai Ma A Mark Ibekwe David E Crowley Ching-Hong Yang

Shiga toxin producing Escherichia coli O157 and non-O157 serogroups are known to cause serious diseases in human. However, research on the persistence of E. coli non-O157 serogroups in preharvest environment is limited. In the current study, we compared the survival behavior of E. coli O157 to that of non-O157 E. coli strains in agricultural soils collected from three major fresh produce growin...

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...

2012
Christian Jenke Shana R. Leopold Thomas Weniger Jörg Rothgänger Dag Harmsen Helge Karch Alexander Mellmann

Highly pathogenic enterohemorrhagic Escherichia coli (EHEC) O157 cause a spectrum of clinical signs that include diarrhea, bloody diarrhea, and hemolytic uremic syndrome. The current evolutionary model of EHEC O157:H7/H(-) consists of a stepwise evolution scenario proceeding from O55:H7 to a node (hypothetical intermediate) that then branches into sorbitol-fermenting (SF) O157:H(-) and non-SF (...

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