Document Detail

A foodborne outbreak due to norovirus in Austria, 2007.
MedLine Citation:
PMID:  19205486     Owner:  NLM     Status:  MEDLINE    
A foodborne norovirus outbreak occurred after a pre-Christmas celebration among a group of local foresters in Austria in December 2007. A total of 66 persons, 60 participants of the Christmas party and 6 kitchen staff members of the restaurant where the party took place, were identified as the at-risk cohort. Questioning of this cohort was performed by self-report questionnaires or telephone interviews (response rate of 95%). The outbreak attack rate was 33.3% (21 of 63 persons), including two of the kitchen staff. Three stool specimens yielded norovirus genogroup II. Univariate analysis revealed that exposure to a ham roll and pastry was possibly associated with risk of gastroenteritis (risk ratio [RR] of 4.45, 95% CI of 1.91 to 10. RR of 2.44, 95% CI of 0.93 to 6.39). After controlling for the effects of sex, age, and other food items with a log-linear model, ham roll remained significantly associated with disease risk (RR of 3.91, 95% CI of 1.57 to 9.76). Ham roll was most likely contaminated with norovirus during preparation by a disease-free kitchen assistant, whose infant became sick with laboratory-confirmed norovirus gastroenteritis 2 days before the party. Informing food handlers about the possible risk of food contamination with norovirus and training them in the appropriate measures of hand hygiene and environmental disinfection at the working place and at home are essential for preventing food-related norovirus outbreaks. Norovirus-infected household members of healthy food handlers must be considered a possible reservoir for foodborne norovirus outbreaks.
Hung-Wei Kuo; Daniela Schmid; Sandra Jelovcan; Anna-Margaretha Pichler; Eva Magnet; Sandra Reichart; Franz Allerberger
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of food protection     Volume:  72     ISSN:  0362-028X     ISO Abbreviation:  J. Food Prot.     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2009-02-11     Completed Date:  2009-03-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7703944     Medline TA:  J Food Prot     Country:  United States    
Other Details:
Languages:  eng     Pagination:  193-6     Citation Subset:  IM    
Austrian Agency for Health and Food Safety, Vienna, Austria.
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MeSH Terms
Austria / epidemiology
Caliciviridae Infections / epidemiology*,  transmission
Cohort Studies
Disease Outbreaks
Feces / virology
Food Contamination / analysis*
Gastroenteritis / epidemiology*
Interviews as Topic
Meat Products / microbiology*
Middle Aged
Norovirus / isolation & purification*
Retrospective Studies
Risk Assessment*
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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