نتایج جستجو برای: eaea gene

تعداد نتایج: 1141478  

2017
Jian Zhao Yan Liu Chenwen Xiao Shaojie He Huochun Yao Guolian Bao

Phage therapy is a valid weapon that we could use to fight against pathogens. Bacteriophages kill bacteria and self-proliferate in the digestive tract. Furthermore, it was assumed that phage therapy could preserve the existing gut microbiota. In this study, 45 rabbits were equally divided into three groups after they were orally inoculated with pathogenic Escherichia coli to induce gut infectio...

2012
Robert Söderlund Ingela Hedenström Anna Nilsson Erik Eriksson Anna Aspán

BACKGROUND Comparatively little is known about the prevalence or the molecular characteristics of the zoonotic pathogen E. coli O157:H7 in the sheep reservoir. To investigate this and determine the host specificity of subclones of the bacterium, we have conducted a slaughterhouse prevalence study in sheep and compared the collected isolates to O157:H7 previously isolated from cattle and human p...

2017
Zeynal Topalcengiz Laura K Strawn Michelle D Danyluk

The microbial quality of water that comes into the edible portion of produce is believed to directly relate to the safety of produce, and metrics describing indicator organisms are commonly used to ensure safety. The US FDA Produce Safety Rule (PSR) sets very specific microbiological water quality metrics for agricultural water that contacts the harvestable portion of produce. Validation of the...

Journal: :Applied and environmental microbiology 2004
Muhammad J Alam Ludek Zurek

The ecology of Escherichia coli O157:H7 is not well understood. The aims of this study were to determine the prevalence of and characterize E. coli O157:H7 associated with houseflies (HF). Musca domestica L. HF (n = 3,440) were collected from two sites on a cattle farm over a 4-month period and processed individually for E. coli O157:H7 isolation and quantification. The prevalence of E. coli O1...

Journal: :Journal of clinical microbiology 2003
Kim N Brett Michael A Hornitzky Karl A Bettelheim Mark J Walker Steven P Djordjevic

stx(2) genes from 138 Shiga toxin-producing Escherichia coli (STEC) isolates, of which 127 were of bovine origin (58 serotypes) and 11 of human origin (one serotype; O113:H21), were subtyped. The bovine STEC isolates from Australian cattle carried ehxA and/or eaeA and predominantly possessed stx(2-EDL933) (103 of 127; 81.1%) either in combination with stx(2vhb) (32 of 127; 25.2%) or on its own ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه الزهراء - دانشکده علوم پایه 1391

به دنبال افزایش مصرف میوه جات و سبزیجات در سراسر جهان، تعداد شیوع های ناشی از مصرف مواد غذایی آلوده با بیماری زا ها از جمله پاتوتایپ های مولد اسهال اشرشیاکلی نیز افزایش یافته است. سویه های اشرشیاکلی بیماری زای روده ای (epec)enteropathogenic escherichia coli عامل مهمی در ایجاد اسهال حاد و مزمن در انسان ها هستند. شیوع هایی از آن در ارتباط با مصرف آب و غذای آلوده بوده است. این مطالعه به منظور ارزی...

Journal: :iranian journal of microbiology 0
pantea mohammadi medical biology research center, university of medical sciences, kermanshah, iran. ramin abiri department of microbiology, faculty of medicine, university of medical sciences, kermanshah, iran. mansour rezaei department of statistics and epidemiology, faculty of health, university of medical sciences, kermanshah, iran. siavosh salmanzadeh-ahrabi department of microbiology, alzahra university, tehran, iran.

background and objectives: infectious diarrhoeal diseases are great problem throughout the world and are responsible for considerable morbidity and mortality. shiga toxin-producing escherichia coli (stec) is a major cause of gastroenteritis that may be complicated by hemorrhagic colitis (hc) or the hemolytic uremic syndrome (hus), which is the main cause of acute renal failure in children. food...

ژورنال: :زیست شناسی میکروارگانیسم ها 0
فرنوش انصاری مرضیه طادی بنی حسین کابلی ویدا نجف زاده حسین طهماسبی حسن ممتاز هیات علمی ناصر خسروی

مقدمه : عوامل بیماری زا ممکن است از طریق مصرف گوشت آلوده به انسان منتقل شوند و ایجاد بیماری کنن د. اشریشیاکلی های تولید کننده شیگاتوکسین می توانند ایجاد اسهال آبکی خفیف تا کمپلکس های جدی از قبیل کولیت هموراجیک و سندروم اورمی همولیتیک تا حتی مرگ نمایند . این مطالعه، به منظور ردیابی اشریشیاکلی های تولید کننده ی شیگاتوکسین در گوشت گوسفندان استان چهارمحال و بختیاری انجام شد.   مواد و روش ‏‏ ها: 90 ...

2016
Singh Parul Basanti Bist Barkha Sharma Udit Jain Janardan K. Yadav

AIM The present study was conducted to find the association among virulence determinants of verotoxic Escherichia coli (VTEC) isolated from cattle calf feces. MATERIALS AND METHODS A total of 216 cattle calf fecal samples were collected aseptically and processed under required conditions for the isolation of E. coli. The isolates were further subjected to multiplex polymerase chain reaction (...

2012
E S. Liepina A. Jemeljanovs

Tasks of the work were study the possible E.coli contamination in red deer meat, identify pathogenic strains from isolated E.coli, determine their incidence in red deer meat and determine the presence of VT1, VT2 and eaeA genes for the pathogenic E.coli. 8 (10%) samples were randomly selected from 80 analysed isolates of E.coli and PCR reaction was performed on them. PCR was done both on initia...

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