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E. coli

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  • E. coli O157:H7
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E. coli

  • E. coli Home
  • E. coli O157:H7
  • Non-O157 STEC
  • HUS
  • Prevention
  • Statistics
  • For Health Professionals

Related Topics

  • Foodborne Illness
  • Food Safety
  • Illnesses from Animals
  • Infectious Diseases A-Z
  • Reportable Infectious Diseases
Contact Info
Infectious Disease Epidemiology, Prevention and Control Division
651-201-5414
IDEPC Comment Form

Contact Info

Infectious Disease Epidemiology, Prevention and Control Division
651-201-5414
IDEPC Comment Form

Escherichia coli O157:H7 (E. coli O157)

E. coli O157:H7 is one of hundreds of strains of the bacterium Escherichia coli. Although most strains are harmless and live in the intestines of healthy humans and animals, this strain produces a powerful toxin and can cause severe illness.

Approximately 160 to 220 cases of E. coli O157:H7 are reported in Minnesota each year.

Fact Sheets

  • E. coli O157:H7 and HUS Fact Sheet (PDF)
    Answers to frequently asked questions about E. coli O157:H7 and the complication Hemolytic Uremic Syndrome (HUS). 
     
  • CDC: Escherichia coli
    Answers to some common questions about E. coli.

Symptoms

  • Common symptoms include:
    • severe bloody diarrhea
    • abdominal cramps
    • little or no fever
  • Other symptoms may include:
    • nonbloody diarrhea
    • or no symptoms at all.
       
  • Symptoms usually begin 2-5 days after infection (range, 1 to 8 days).

Duration of Illness

  • The illness usually resolves in 5 to 10 days. 

Complications

  • Hemolytic Uremic Syndrome develops in about 5% of reported E. coli O157:H7 cases, most frequently in young children or the elderly.

Transmission

  • Many illnesses have been associated with eating undercooked, contaminated ground beef.
  • Produce items (e.g., lettuce, sprouts) can be contaminated through contact with cattle feces in the field.
  • Person-to-person contact in families and childcare centers is also a common mode of transmission.
  • Infection can also occur after drinking raw milk and after swimming in or drinking water contaminated by farm animals, usually cattle.

Do you suspect that you have a foodborne or waterborne illness? Visit reporting suspected foodborne/waterborne illnesses.

Tags
  • ecoli
Last Updated: 06/24/2025

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