title: A regional Salmonella enterica serovar Typhimurium outbreak associated with raw beef products, The Netherlands, 2010.
abstract: Between April and May 2010, several medical microbiological laboratories in the Netherlands notified a total of 90 cases of Salmonella enterica serovar Typhimurium with the same antibiogram type (resistant for ampicillin, tetracycline, and co-trimoxazol) and the same multiple locus variable number tandem repeats analysis pattern (03-16-09-NA-311) or single locus variants. Date of illness onset ranged from end of March to mid-May with a peak in the second week of April. Almost half of the cases were hospitalized. Cases completed a questionnaire about food items and other risk factors in the 7 days before illness onset. A matched case-control study was performed. Consumption of "ossenworst" (matched odds ratio 48.2 [95% confidence interval (CI): 3.9-595.9]) and filet américain (8.5 [95% CI: 1.0-73.6]) were found to be significant risk factors for illness. Eighty percent of the cases had eaten at least one or both raw meat products. The producer of the ground beef that was used to produce the "ossenworst" was identified, but no microbiological evidence was found. Consumers should be made more aware of the presence of raw meat in ready-to-eat products and of the potential risk in eating these products. Vulnerable persons such as young children, elderly, and persons with poor health should be discouraged from eating these products. Detection of this outbreak was mainly based on the antibiogram pattern that had identified possible cases 10 days before detailed typing results from the reference laboratory became available, thus facilitating early case findings.
authors: Centre for Infectious Disease Control, National Institute for Public Health and the Environment (Rijksinstituut voor Volksgezondheid en Milieu, RIVM), Bilthoven, The Netherlands. ingrid.friesema@rivm.nl
authors: Ingrid H M
authors: IH
authors: Friesema
authors: Barbara
authors: B
authors: Schimmer
authors: Jeanette A
authors: JA
authors: Ros
authors: Henk Jan
authors: HJ
authors: Ober
authors: Max E O C
authors: ME
authors: Heck
authors: Corien M
authors: CM
authors: Swaan
authors: Carolien M
authors: CM
authors: de Jager
authors: Rosa M
authors: RM
authors: Peran i Sala
authors: Wilfrid
authors: W
authors: van Pelt
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000818:Animals; D016022:Case-Control Studies; D002417:Cattle; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D024901:Drug Resistance, Multiple, Bacterial; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008461:Meat Products / Q000382:microbiology*; D008875:Middle Aged; D009426:Netherlands / Q000453:epidemiology; D012478:Salmonella Food Poisoning / Q000453:epidemiology* / Q000382:microbiology; D012486:Salmonella typhimurium / Q000187:drug effects / Q000235:genetics / Q000302:isolation & purification*; D011795:Surveys and Questionnaires; D055815:Young Adult