نتایج جستجو برای: ecoli o157

تعداد نتایج: 6123  

Journal: :Applied and environmental microbiology 2001
J R Fischer T Zhao M P Doyle M R Goldberg C A Brown C T Sewell D M Kavanaugh C D Bauman

Studies were conducted to evaluate fecal shedding of Escherichia coli O157:H7 in a small group of inoculated deer, determine the prevalence of the bacterium in free-ranging white-tailed deer, and elucidate relationships between E. coli O157:H7 in wild deer and domestic cattle at the same site. Six young, white-tailed deer were orally administered 10(8) CFU of E. coli O157:H7. Inoculated deer we...

Journal: :Journal of bacteriology 2007
Myriam Wilbaux Natacha Mine Anne-Marie Guérout Didier Mazel Laurence Van Melderen

Toxin-antitoxin (TA) systems are widely represented on mobile genetic elements as well as in bacterial chromosomes. TA systems encode a toxin and an antitoxin neutralizing it. We have characterized a homolog of the ccd TA system of the F plasmid (ccd(F)) located in the chromosomal backbone of the pathogenic O157:H7 Escherichia coli strain (ccd(O157)). The ccd(F) and the ccd(O157) systems coexis...

2010
Sangeeta Khare Walid Alali Shuping Zhang Doris Hunter Roberta Pugh Ferric C Fang Stephen J Libby L Garry Adams

BACKGROUND Escherichia coli serogroup O157:H7 has emerged as an important zoonotic bacterial pathogen, causing a range of symptoms from self-limiting bloody diarrhea to severe hemorrhagic colitis and hemolytic-uremic syndrome in humans. Beef and dairy cattle are considered the most important animal reservoirs for this pathogen. One of the important virulence characteristics of E. coli O157:H7 i...

Journal: :Revista Mvz Cordoba 2023

Objetivo. Evaluar la calidad higiénico-sanitaria de leche bovina Nariño mediante los recuentos mesófilos aerobios y células somáticas determinar presencia microorganismos ambientales importantes en salud pública como Salmonella spp., Escherichia coli O157, Listeria monocytogenes, Staphylococcus aureus Yersinia enterocolítica evaluar las variaciones parámetros dos periodos lluviosos diferentes. ...

Journal: :Journal of Applied Microbiology 2021

Aims The purpose of this study was to investigate the occurrence Escherichia coli O157 and O26 on Belgian dairy cattle farms, presence virulence genes in confirmed isolates association E. with calf diarrhoea. Methods Results In total, 233 recto-anal mucosal swabs (RAMS) were obtained from healthy diarrheic calves three each alternately visited consecutive times. RAMS analysed for O26, stx1, stx...

2017
Sayali S Karve Suman Pradhan Doyle V Ward Alison A Weiss

Infection with Shiga toxin (Stx) producing Escherichia coli O157:H7 can cause the potentially fatal complication hemolytic uremic syndrome, and currently only supportive therapy is available. Lack of suitable animal models has hindered study of this disease. Induced human intestinal organoids (iHIOs), generated by in vitro differentiation of pluripotent stem cells, represent differentiated huma...

Journal: :Applied and environmental microbiology 2006
Sinisa Vidovic Darren R Korber

The prevalence of Escherichia coli O157 associated with feedlot cattle in Saskatchewan was determined in a 10-month longitudinal study (3 feedlots) and a point prevalence study (20 feedlots). The prevalence of E. coli O157 at the three different sites in the horizontal study varied from 2.5 to 45%. The point prevalence of E. coli O157 among Saskatchewan cattle from 20 different feedlots ranged ...

2013
Taoxiang Zhang Haizhen Wang Laosheng Wu Jun Lou Jianjun Wu Philip C. Brookes Jianming Xu

Escherichia coli O157:H7 (E. coli O157:H7) is recognized as a hazardous microorganism in the environment and for public health. The E. coli O157:H7 survival dynamics were investigated in 12 representative soils from Jiangsu Province, where the largest E. coli O157:H7 infection in China occurred. It was observed that E. coli O157:H7 declined rapidly in acidic soils (pH, 4.57 - 5.14) but slowly i...

Journal: :Journal of clinical microbiology 2011
Marc Roger Couturier Bonita Lee Nathan Zelyas Linda Chui

Shiga-toxigenic Escherichia coli (STEC) is an important cause of diarrheal disease. The most notorious STEC serotype is O157:H7, which is associated with hemorrhagic colitis and hemolytic-uremic syndrome (HUS). As a result, this serotype is routinely screened for in clinical microbiology laboratories. With the bias toward the identification of the O157 serogroup in routine diagnostic processes,...

2014
Alireza Koochakzadeh Mahdi Askari Badouei Emad Mazandarani Omid Madadgar

BACKGROUND AND OBJECTIVES A diverse group of Escherichia coli are known as enterohemorrhagic Escherichia coli (EHEC) including O157:H7 and non-O157 EHEC. Enterohemorrhagic strains are related to sever clinical conditions in humans including hemorrhagic colitis and hemolytic uremic syndrome, and most of the recorded outbreaks occurred due to O157: H7 E. coli. The aim of the present study was to ...

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