title: Investigation of an outbreak of E. coli O157 infections associated with a trip to France of schoolchildren from Somerset, England.
abstract: A retrospective cohort study was conducted after 2 confirmed and 8 probable cases of VTEC 0157 occurred in a schoolgroup from Somerset following a trip to France. The strain of the 2 confirmed cases was vero-cytotoxin type 2, phage type 34. Despite its low statistical power due to small numbers, this study suggested the most likely vehicle of infection was cucumber salad (crude RR=4.3, 95%CI [0.6-29], adjusted OR=107, 95%CI indeterminate, p=0.08). The cucumbers were purchased from Belgium but it was not possible to trace them back to source. The international nature of this outbreak emphasises the importance of close collaboration between organisations in the management of outbreaks, of ensuring international standards in food safety, and of agreeing a common standard in VTEC typing across Europe.
authors.affiliation: Communicable Diseases Surveillance Centre (South West), Public Health Laboratory, Gloucestershire Royal Hospital, Gloucester, England, United Kingdom.
authors.forename: E
authors.initials: E
authors.lastname: Duffell
authors.forename: E
authors.initials: E
authors.lastname: Espié
authors.forename: T
authors.initials: T
authors.lastname: Nichols
authors.forename: G K
authors.initials: GK
authors.lastname: Adak
authors.forename: H
authors.initials: H
authors.lastname: De Valk
authors.forename: K
authors.initials: K
authors.lastname: Anderson
authors.forename: J M
authors.initials: JM
authors.lastname: Stuart
mesh_terms: D000293:Adolescent; D000328:Adult; D015331:Cohort Studies; D003090:Coliphages; D018553:Cucumis sativus / Q000382:microbiology; D004196:Disease Outbreaks; D004739:England / Q000453:epidemiology; D004927:Escherichia coli Infections / Q000453:epidemiology* / Q000378:metabolism / Q000473:pathology; D019453:Escherichia coli O157 / Q000302:isolation & purification*; D005506:Food Contamination; D005602:France / Q000453:epidemiology; D006801:Humans; D008297:Male; D012189:Retrospective Studies; D022641:Shiga Toxin 2 / Q000096:biosynthesis; D011795:Surveys and Questionnaires
chemical_list: D022641:Shiga Toxin 2