In 1997 the first outbreak of Escherichia coli O157 : H7 infections involving 14 cases occurred in Finland.
A case was defined as a resident of Alavus with an episode of diarrhoea between 5 and 17 July 1997, and from whom E. coli O157 : H7 was isolated from stool.
The investigation included case searching and a population-based case control study.
Five primary and eight symptomatic secondary cases of E. coli 0157 : H7 illness were detected.
In the 10 days before the outbreak, all 5 primary patients (aged 3-8 years), but only 6 of 32 population controls from the same age range (Fisher's test, P<0.001) and 4 of 10 sibling controls (P<0.05) had visited (but had not necessarily bathed in) a shallow beach popular among young children.
Four out of 5 primary cases had remained within 5 m of the beach while swimming and had swallowed lake water compared to 1 of 5 population controls.
These analytical epidemiologic findings incriminated fresh lake water as the vehicle of E. coli 0157 : H7 transmission.
Mots-clés Pascal : Escherichia coli, Enterobacteriaceae, Bactérie, Colibacillose, Bactériose, Infection, Epidémie, Baignade, Lac, Finlande, Europe, Epidémiologie, Diarrhée, Appareil digestif pathologie, Intestin pathologie
Mots-clés Pascal anglais : Escherichia coli, Enterobacteriaceae, Bacteria, Colibacillosis, Bacteriosis, Infection, Epidemic, Bathing, Lakes, Finland, Europe, Epidemiology, Diarrhea, Digestive diseases, Intestinal disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0193813
Code Inist : 002B05B02F. Création : 16/11/1999.