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ID 45264
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Author
Mizoguchi, Yoshinori
Tsuchida, Hiroaki
Tsuda, Toshihide ORCID Kaken ID researchmap
Yamamoto, Eiji
Nakase, Katsumi
Abstract
There have been only 2 reports of a large-scale foodborne outbreak arising from Salmonella enterica serotype Braenderup infection worldwide. On August 9, 2008, an outbreak originating in boxed lunches occurred in Okayama, Japan. We conducted a cohort study of 786 people who received boxed lunches from a particular catering company and collected 644 questionnaires (response rate:82%). Cases were defined as those presenting with diarrhea (≧4 times in 24h) or fever (≧38℃) between 12 am on August 8 and 12 am on August 14. We identified 176 cases (women/men:39/137);younger children (aged<10 years) appeared to more frequently suffer severe symptoms. Three food items were significantly associated with higher risk of illness;tamagotoji (soft egg with mixed vegetables and meat) (relative risk (RR):11.74, 95% confidence interval (CI):2.98-46.24), pork cooked in soy sauce (RR:3.17, 95% CI:1.24-8.10), and vinegared food (RR:4.13, 95% CI:1.60-10.63). Among them, only the RR of tamagotoji was higher when we employed a stricter case definition. Salmonella Braenderup was isolated from 5 of 9 sampled cases and 6 food handlers. It is likely that unpasteurized liquid eggs contaminated by Salmonella Braenderup and used in tamagotoji caused this outbreak.
Keywords
boxed lunch
cohort study
foodborne diseases
Salmonella Braenderup
unpasteurized liquid eggs
Amo Type
Original Article
Published Date
2011-04
Publication Title
Acta Medica Okayama
Volume
volume65
Issue
issue2
Publisher
Okayama University Medical School
Start Page
63
End Page
69
ISSN
0386-300X
NCID
AA00508441
Content Type
Journal Article
language
英語
Copyright Holders
CopyrightⒸ 2011 by Okayama University Medical School
File Version
publisher
Refereed
True
PubMed ID
Web of Science KeyUT