- Report of detection of diarrheagenic E. coli (excluding EHEC, ETEC and EIEC) in Japan, January 2001-August 2011
- Questionnaire-based survey on diarrheagenic E. coli examinations in PHIs
- Proposed revision of classification of diarrheagenic E. coli in NESID
- An outbreak of foodborne illness due to EAggEC O126:H27 handled as consumer complaints, April 2011—Hamamatsu City
- Food poisoning outbreak due to atypical EPEC OUT:HNM, May 2011—Kumamoto
- Outbreak investigation of wide area food poisoning due to ETEC O148, September 2011
- Wide area food poisoning due to ETEC O148 involving kitchens in four places of business, September 2011—Yokohama City
- Group A rotavirus infection outbreak among adults, November 2011—Ibaraki
- Leptospirosis outbreak among outdoor workers after heavy rains, November 2011—Kochi
- Isolation of Bordetella holmesii from a young child with pertussis-like illness, August 2011—Osaka
- Observation of subtype AH3 influenza in a pediatric sentinel clinic in Nara Prefecture, 1998-2011
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