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E Coli Infection

Medically reviewed by Drugs.com. Last updated on Jun 2, 2025.

What is an E coli infection?

An E coli (Escherichia coli) infection is a type of foodborne illness. Many types of E coli bacteria normally live in the intestines and are usually harmless. Infection may happen if other, harmful types of E coli bacteria contaminate food or liquid. An infection can also happen if the bacteria that normally live in your intestines move to another part of your body. Examples are a urinary tract infection (UTI), bloodstream infection, pneumonia, or meningitis.

What increases my risk for an E coli infection?

What are the signs and symptoms of an E coli infection?

Symptoms are usually worst for children younger than 5 years and adults older than 65. You may have any of the following, depending on the body area affected:

How is an E coli infection diagnosed?

Your healthcare provider will ask about your symptoms and the foods you have eaten recently. Your provider will ask when you last ate, and where you were. Your provider may want to know if anyone who ate with you is also sick. Your provider will examine your abdomen and check for signs of dehydration. Dehydration can happen if you have diarrhea or are vomiting. You may also need the following:

How is an E coli infection treated?

Treatment depends on how severe your symptoms become:

How can I manage an E coli infection?

How can I prevent an E coli infection?

Call your local emergency number (911 in the US) or have someone call if:

When should I seek immediate care?

When should I call my doctor?

Care Agreement

You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your healthcare providers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.