Outbreak of Salmonella Braenderup infection originating in boxed lunches in Japan in 2008

Yoshinori Mizoguchi, Etsuji Suzuki, Hiroaki Tsuchida, Toshihide Tsuda, Eiji Yamamoto, Katsumi Nakase, Hiroyuki Doi

Research output: Contribution to journalArticle

9 Citations (Scopus)

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 24 h) or fever (> 38°C) 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: 1.6010.63). 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.

Original languageEnglish
Pages (from-to)63-69
Number of pages7
JournalActa Medica Okayama
Volume65
Issue number2
Publication statusPublished - 2011

Fingerprint

Lunch
Salmonella
Salmonella Infections
Disease Outbreaks
Japan
Confidence Intervals
Food
Soy Foods
Salmonella enterica
Meats
Vegetables
Meat
Eggs
Ovum
Diarrhea
Cohort Studies
Fever
Liquids
Infection
Industry

Keywords

  • Boxed lunch
  • Cohort study
  • Foodborne diseases
  • Salmonella Braenderup
  • Unpasteurized liquid eggs

ASJC Scopus subject areas

  • Medicine(all)
  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

Mizoguchi, Y., Suzuki, E., Tsuchida, H., Tsuda, T., Yamamoto, E., Nakase, K., & Doi, H. (2011). Outbreak of Salmonella Braenderup infection originating in boxed lunches in Japan in 2008. Acta Medica Okayama, 65(2), 63-69.

Outbreak of Salmonella Braenderup infection originating in boxed lunches in Japan in 2008. / Mizoguchi, Yoshinori; Suzuki, Etsuji; Tsuchida, Hiroaki; Tsuda, Toshihide; Yamamoto, Eiji; Nakase, Katsumi; Doi, Hiroyuki.

In: Acta Medica Okayama, Vol. 65, No. 2, 2011, p. 63-69.

Research output: Contribution to journalArticle

Mizoguchi, Y, Suzuki, E, Tsuchida, H, Tsuda, T, Yamamoto, E, Nakase, K & Doi, H 2011, 'Outbreak of Salmonella Braenderup infection originating in boxed lunches in Japan in 2008', Acta Medica Okayama, vol. 65, no. 2, pp. 63-69.
Mizoguchi, Yoshinori ; Suzuki, Etsuji ; Tsuchida, Hiroaki ; Tsuda, Toshihide ; Yamamoto, Eiji ; Nakase, Katsumi ; Doi, Hiroyuki. / Outbreak of Salmonella Braenderup infection originating in boxed lunches in Japan in 2008. In: Acta Medica Okayama. 2011 ; Vol. 65, No. 2. pp. 63-69.
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