How can I tell if I have an E. coli infection?

People with E. coli infection usually have a sudden onset of diarrhea, often with visible blood, and stomach cramps. Most people have no fever or a very low-grade fever. A stool sample tested specifically for E. coli is the best way to determine if someone is infected.


Taking antibiotics or over-the-counter anti-diarrhea medicines can make the infection worse. Call your doctor if you experience sudden diarrhea with blood in it.

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1. What is E. coli?
2. How can I tell if I have an E. coli infection?
3. Is E. coli infection dangerous?
4. How is E. coli spread?
5. What can I do to protect myself and my family from E. coli?