Impact of free verotoxin testing on epidemiology of diarrhea caused by verotoxin-producing Escherichia coli
نویسندگان
چکیده
منابع مشابه
Isolation of verotoxin-producing Escherichia coli O-rough:K1:H7 from two patients with traveler's diarrhea.
Two Escherichia coli O-rough:K1:H7 strains producing verotoxin 1 that were isolated from stool samples of two travelers with diarrhea who consulted our clinic after trips to the Indian Subcontinent and Central America were characterized. Both strains were sorbitol negative, the same phenotype presented by E. coli O157:H7, but in contrast they were beta-glucuronidase positive. Low-frequency rest...
متن کاملFactors associated with fecal shedding of verotoxin-producing Escherichia coli O157 on dairy farms.
Fecal samples were collected from 4,361 dairy cows on 91 dairy operations between 26 February and 8 July 1996. Fecal samples were cultured for Escherichia coli O157, and positive isolates were probed for verotoxin-producing genes. A total of 52 (1.2%) fecal samples on 22 (24.2%) operations were positive for verotoxin-producing E. coli O157. Herds in which samples were collected on or after 1 Ma...
متن کاملImmunocompromise in gnotobiotic pigs induced by verotoxin-producing Escherichia coli (O111:NM).
A verotoxin-producing Escherichia coli serotype O111:NM strain (strain 10049; verotoxin 1 positive) persistently infected experimentally inoculated gnotobiotic pigs, causing attaching-effecting intestinal lesions and chronic diarrhea. Experiments were performed to determine whether persistent infection might be associated with immunocompromise of the host of this organism. Pigs inoculated with ...
متن کاملLoss of O157 O antigenicity of verotoxin-producing Escherichia coli O157:H7 surviving under starvation conditions.
Verotoxin (VT)-producing Escherichia coli O157:H7 was culturable on agar media after being left in water for 21 months. However, there were a number of colonies which had lost O157 O antigenicity. These colonies produced VTs, which are pathogenic to humans. These observations suggest that the immunologic methods based on O157 O antigenicity are unable to detect and isolate VT-producing E. coli ...
متن کاملPrevalence of Verotoxin-Producing Escherichia coli (VTEC) in a survey of dairy cattle in Najaf, Iraq
BACKGROUND AND OBJECTIVES Dairy cattle have been implicated as principal reservoir of Verotoxin-Producing Escherichia coli (VTEC), with undercooked ground beef and raw milk being the major vehicles of food borne outbreaks. VTEC has been implicated as an etiological agent of individual cases and outbreaks in developed countries. This study was designed to determine the prevalence of VETEC in dia...
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ژورنال
عنوان ژورنال: Journal of Clinical Microbiology
سال: 1995
ISSN: 0095-1137,1098-660X
DOI: 10.1128/jcm.33.5.1114-1120.1995