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  1. Risk factors for sporadic infection with Escherichia coli O157 : H7.

    Article - En anglais

    Background 

    Little is known about risk factors for sporadic infection with Escherichia coli 0157 : H7.

    In response to a sharp increase in reported cases in New Jersey during July 1994, we conducted a case-control study to identify principal sources of infection and contributing practices.

    Methods 

    Standardized questionnaires were used to evaluate (1) potential exposures of case patients and matched controls and (2) knowledge, attitudes, and practices of food preparers in case and control households.

    Patient isolates were subtyped by pulsed-field gel electrophoresis.

    Results 

    Patients with E coli 0157 : H7 infection (N=23 ; median age, 9 years ; 55% female) were more likely than healthy controls to have eaten a hamburger in the week preceding illness (matched odds ratio, undefined ; P<. 001) ; 80% of the hamburgers eaten by ill persons were prepared at home.

    Food preparers in case households were less likely than those in control households to report washing their hands (odds ratio, 8.5 ; P<. 005) and work surfaces (odds ratio, 10.5 ; P<. 05) after handling raw ground beef.

    Pulsed-field gel electrophoresis yielded 17 unique subtypes among the 23 patient isolates, indicating multiple sources of infection.

    Conclusions 

    Hamburgers prepared at home are an important source of sporadic E coli 0157 : H7 infections.

    We estimate that adequate hand washing by food preparers could have prevented 34% of E coli 0157 : H7 infections in the study population.

    Mots-clés Pascal : Escherichia coli, Enterobacteriaceae, Bactérie, Infection, Sporadique, Facteur risque, Dépistage, Incidence, Etiologie, Fréquence, Evaluation, Prévention, Homme, Bactériose, Appareil digestif pathologie, Escherichia Coli O157:H7.

    Mots-clés Pascal anglais : Escherichia coli, Enterobacteriaceae, Bacteria, Infection, Sporadic, Risk factor, Medical screening, Incidence, Etiology, Frequency, Evaluation, Prevention, Human, Bacteriosis, Digestive diseases

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 97-0148020

    Code Inist : 002B05B02P. Création : 21/05/1997.