Multinational outbreak of Salmonella enterica serotype Newport infections due to contaminated alfalfa sprouts.
Context In December 1995, reported Salmonella enterica serotype Newport (SN) infections increased sharply in Oregon and British Columbia but not elsewhere in North America.
Similar unexplained increases had been noted in 6 other states in the fall of 1995.
Objective To determine the source of the outbreak (s).
Design Case-control studies, environmental investigations, bacterial subtyping, and surveillance information review.
Settings Oregon and British Columbia communities (winter 1995-1996) and Georgia, Oklahoma, Pennsylvania, Vermont, Virginia, and West Virginia (fall 1995).
Participants Oregon and British Columbia residents with culture-confirmed SN infections and onset from December 1,1995, through February 29,1996, and healthy community controls.
Main Outcome Measures Odds ratio (OR) of illness associated with exposures ; distribution patterns and culture of alfalfa seeds and sprouts ; subtyping of SN isolates.
Results We identified 133 cases in Oregon and British Columbia ; 124 (93%) occurred in patients older than 18 years ; 87 (65%) were female.
Case patients were more likely than community control subjects to report having eaten alfalfa sprouts in the 5 days preceding illness (41% [17/41] vs 4% [3/75] ; OR, 17.0 ; 95% confidence interval, 4.3-96.0).
Case isolates shared a distinctive pulsed-field gel electrophoresis (PFGE) pattern.
The SN was grown from seeds and alfalfa sprouts. (...)
Mots-clés Pascal : Salmonellose, Bactériose, Infection, Salmonella newport, Enterobacteriaceae, Bactérie, Etats Unis, Amérique du Nord, Amérique, Pullulation, Homme, Exploration, Epidémiologie, Contamination, Source
Mots-clés Pascal anglais : Salmonellosis, Bacteriosis, Infection, Salmonella newport, Enterobacteriaceae, Bacteria, United States, North America, America, Outbreak, Human, Exploration, Epidemiology, Contamination, Source
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0085595
Code Inist : 002B05B02F. Création : 31/05/1999.