A biphasic outbreak of gastroenteritis caused by Salmonella hadar affected canteen employees and workers at a construction site in central Italy in September 1994.
There were 448 symptomatic cases, from 61 of whom group C Salmonella was isolated.
Six cases were canteen employees.
Twenty-two other individuals were asymptomatic excreters.
There were 10 secondary cases.
Working as a food handler at the canteen constituted an increased risk of infection, independently of ingestion of the food (odds ratio : 62.1 ; 95% confidence interval (CI) : 9.5-406.6).
Having eaten at the canteen on the 19th and 20th September was identified as risk factor for subjects symptomatic within 72 hours (relative risk (RR) : 17.0,95% CI : 2.3-124.3), and cooled meat salad was identified as the vehicle of infection (RR : 36.6,95% CI : 14.3-93.8).
The use of portable toilets was another possible route of transmission of infection for all cases (RR : 1.3,95% CI : 1.0-1.6).
The index case was a cook who had symptoms five days before the peak of the outbreak.
From 27 individuals both symptomatic and asymptomatic excreters group B, group D and not-typed Salmonellas were isolated.
This study underlines the problem of improper food handling in salmonellosis outbreaks and emphasizes the role of several vehicles in the transmission of salmonellosis in a community.
Mots-clés Pascal : Salmonellose, Bactériose, Infection, Salmonella, Enterobacteriaceae, Bactérie, Gastroentérite, Epidémiologie, Transmission homme homme, Intoxication alimentaire, Manipulation, Aliment, Restauration collective, Hygiène, Foyer infectieux, Homme, Appareil digestif pathologie, Estomac pathologie, Intestin pathologie, Salmonella hadar
Mots-clés Pascal anglais : Salmonellosis, Bacteriosis, Infection, Salmonella, Enterobacteriaceae, Bacteria, Gastroenteritis, Epidemiology, Transmission from man to man, Food poisoning, Manipulation, Food, Catering, Hygiene, Infectious focus, Human, Digestive diseases, Gastric disease, Intestinal disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0147789
Code Inist : 002B05B02F. Création : 21/07/1998.