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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1999 Portland, Oregon, Potluck Luncheon Tamales and Chicken with Mole Sauce

An investigation into an outbreak of gastroenteritis among people who attended a potluck lunch in Portland, Oregon, was conducted in September. Risk of illness was associated with eating the tamales or a chicken with mole sauce. Cultures confirmed C. perfringens in tamales and the chicken entree; two stool specimens had small numbers of organisms. Pulse field gel electrophoresis identified two C. perfringens subtypes: one subtype occurred in both foods and one stool specimen, the other subtype occurred in the tamales and the other stool specimen.

  • Outbreak began:
  • September 1999
  • Affected Country:
  • US
  • Affected States/Territories:
  • Oregon
  • Organism(s):
  • Clostridium perfringens
  • Vehicle(s):
  • Grains, Tamales Poultry, Chicken dish, Chicken with mole sauce
  • Molecular Results Available:
  • Yes
  • Test Results:
  • Unknown
  • Location(s):
  • Potluck
  • Brand Name(s):
  • Product Subject to Recall:
  • No
  • Total ill:
  • 39
  • Number ill by Case Definition Known:
  • Yes
  • Number Laboratory Confirmed Cases:
  • 2
  • Number Probable Cases:
  • 37
  • Number Possible Cases:
  • 0
  • Anyone Hospitalized:
  • Unknown
  • Number Hospitalized:
  • Unknown
  • Any Deaths:
  • Unknown
  • Number Dead:
  • Unknown
  • Any References:
  • Yes

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