In June 1983, an outbreak of waterborne giardiasis occurred in a group of 93 university students and faculty participating in a geology field course in Colorado.
All cases occurred in one subgroup of persons who were heavily exposed to untreated stream water on a field trip, and the risk of illness was strongly related to the amount of untreated stream water consumed.
The median incubation period from a brief exposure to the first symptom was 7 days.
The authors compared symptoms and stool sample results among 31 Giardia-positive persons in the exposed group and 36 Giardia-negative participants in an unexposed group to assess several case definitions for acute giardiasis.
Mots-clés Pascal : Protozoose, Infection, Etats Unis, Amérique du Nord, Amérique, Giardiase, Contamination, Cours eau, Epidémiologie, Méthodologie, Homme, Foyer infectieux, Colorado, Appareil digestif pathologie
Mots-clés Pascal anglais : Protozoal disease, Infection, United States, North America, America, Giardiasis, Contamination, Stream, Epidemiology, Methodology, Human, Infectious focus, Colorado, Digestive diseases
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 91-0460735
Code Inist : 002B05B02F. Création : 199406.