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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2003 Outbreak of Yersinia psuedotuberculosis at a School, Finland

A cluster of gastrointestinal illness and erythema nodosum was detected among Finnish day care center and school children who had eaten lunches prepared by the same institutional kitchen. A case control study was conducted. Only grated carrots were significantly associated with illness. With increased consumption of grated carrot, the severity of symptoms increased. The outbreak strain of Yersinia psuedotuberculosis was isolated from soil samples and from processing equipment at the farm where the carrots had originated. There were no domestic animals on the farm or nearby. Animal manure was not used, and the fields had not been irrigated. The carrots had been harvested the previous fall and had overwintered in an unenclosed barn which was accessible to rodents. The grated carrots were delivered to the kitchen by the distributor, refrigerated, and then served without additional washing or cleaning. Most children experienced fever and abdominal pain. Sixty one of the children had erythema nodosum, and one had reactive arthritis. Nine children were hospitalized, and one child underwent an appendectomy. The Yersinia isolates from forty of the fifty two children were Yersinia pseudotubercolis O:1. Thirty nine of these isolates were a complete genetic match to one another; one isolate differed by one band.

  • Outbreak began:
  • May 2003
  • Affected Country:
  • International
  • Affected States/Territories:
  • Not Applicable
  • Organism(s):
  • Other
  • Vehicle(s):
  • Vegetable, Carrots
  • Molecular Results Available:
  • Yes
  • Test Results:
  • Unknown
  • Location(s):
  • School
  • Brand Name(s):
  • Product Subject to Recall:
  • No
  • Total ill:
  • 111
  • Number ill by Case Definition Known:
  • Yes
  • Number Laboratory Confirmed Cases:
  • 58
  • Number Probable Cases:
  • 53
  • Number Possible Cases:
  • 0
  • Anyone Hospitalized:
  • Yes
  • Number Hospitalized:
  • 9
  • Any Deaths:
  • No
  • Number Dead:
  • 0
  • Any References:
  • Yes

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