Foodborne Illness Outbreak Database

This database provides summaries of significant food and water related outbreaks occurring since 1984 caused by E. coli, Salmonella, Hepatitis A, Campylobacter and other pathogens. Read more »

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Japan Clam 2001

A party of 57 people dined together in Hamamatsu City, Japan, in December, 2001. The next day, 22 of them developed diarrhea, vomiting, and fever. Four were confirmed to be infected with norovirus. One month later, four people from the same party developed hepatitis A. The group had eaten purple Washington clam (Saxidomus purpuratus) which had been imported from China and was subsequently lightly steamed with red pepper. The clams underwent subsequent viral examination. The genes for norovirus and hepatitis A were present. The hepatitis A strain isolated from the clam genetically matched the hepatitis A strain detected in the people. This food source caused two outbreaks.

  • Outbreak began:
  • December 2001
  • Affected Country:
  • International
  • Affected States/Territories:
  • Not Applicable
  • Organism(s):
  • Hepatitis, Norovirus
  • Vehicle(s):
  • Seafood, Shellfish, Clams
  • Molecular Results Available:
  • No
  • Test Results:
  • None
  • Location(s):
  • Restaurant
  • Brand Name(s):
  • Product Subject to Recall:
  • Unknown
  • Total ill:
  • 26
  • Number ill by Case Definition Known:
  • Yes
  • Number Laboratory Confirmed Cases:
  • 8
  • Number Probable Cases:
  • 18
  • Number Possible Cases:
  • 0
  • Anyone Hospitalized:
  • Unknown
  • Number Hospitalized:
  • Unknown
  • Any Deaths:
  • Unknown
  • Number Dead:
  • Unknown
  • Any References:
  • Yes

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