Epidemiological explanation of an outbreak of gastro-enteritis in Sweden in the absence of detailed microbiological information.
Waterborne gastroenteritis outbreaks have often gone undetected or been incompletely defined in terms of source and extent.
Methods which allow detection or clarification of such events are therefore useful.
We describe the methods used to detect and investigate such an outbreak.
In autumn 1996 high school absence rates and the rate of parents absent from work to care for sick children suggested a health problem in a Swedish town which had a history of unexplained outbreaks of gastrointestinal disease.
A systematic sample of 300 households was surveyed by post.
Respondents represented 10% of the total population of the town.
Questions concerning symptoms and exposures were included.
The same questionnaire was used in a nearby town as a control.
Sixty four percent of respondents reported an acute gastrointestinal illness during a two month period.
Diarrhoea (90%) and abdominal pain (88%) were the most frequent symptoms among the sick.
Two percent of those sick sought medical care.
Exposures associated with disease were being a member of a large household, young age, and consumption of water from the community water supply.
Attack rate showed a dose response relationship with increasing frequency of water consumption.
The peak incidence of gastrointestinal illness occurred shortly after raw water quality control data had shown a rise in indicator bacteria. (...)
Mots-clés Pascal : Gastroentérite, Approvisionnement eau, Source, Microbiologie, Absentéisme, Epidémiologie, Facteur risque, Incidence, Enfant, Homme, Milieu scolaire, Adulte, Suède, Europe, Appareil digestif pathologie, Estomac pathologie, Intestin pathologie
Mots-clés Pascal anglais : Gastroenteritis, Water supply, Source, Microbiology, Absenteeism, Epidemiology, Risk factor, Incidence, Child, Human, School environment, Adult, Sweden, Europe, Digestive diseases, Gastric disease, Intestinal disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0050756
Code Inist : 002B05B02F. Création : 31/05/1999.