Bacteria · Digestive
Escherichia coli (E. coli)
Diarrhoeal illness; urinary and other infections with some strains
The short answer
Most E. coli are harmless intestinal organisms. Some cause diarrhoea, urinary infection or severe illness. There is no single treatment without knowing the specimen and clinical context.
Transmission and timing
Diarrhoeal strains can spread through contaminated food, water or animal or human contact. E. coli in stool and E. coli in a urine culture raise different clinical questions.
CDC ↗Symptoms and risk groups
The diarrhoea section focuses on intestinal infection. Bloody diarrhoea or severe abdominal symptoms make identification of the strain particularly important.
CDC ↗When to seek help
Seek assessment for bloody diarrhoea, dehydration or reduced urination. STEC infection can be associated with haemolytic uraemic syndrome affecting the kidneys.
CDC ↗For life-threatening symptoms, severe breathing difficulty or altered consciousness, call your local emergency number (112 in Türkiye).
What does the test show?
Read the specimen type, Shiga toxin/STEC findings and clinical interpretation together. The organism’s name alone does not indicate severity.
CDC ↗Care and treatment approach
In STEC infection, antibiotics and anti-diarrhoeal medicines may increase harm; do not start them yourself. This does not mean all E. coli infections have the same management.
CDC ↗Prevention and everyday life
Food safety, safe water and hand hygiene after animal contact help reduce spread. Explain the relevant specimen and exposure when seeking care.
CDC ↗Clinical assessment note
Separate possible STEC diarrhoea from urinary infection management. Shiga toxin testing, culture and susceptibility requirements depend on the syndrome.
CDC ↗Bring a question to your appointment
Which specimen is this result from, and has STEC been considered?
International evidence, local decisions
Each source’s country is identified. Vaccine access, reimbursement, isolation and reporting rules vary. Use current guidance and your clinician’s advice in your country; English does not imply UK or US eligibility.
Sources and supporting evidence
- CDC · About Escherichia coli infection ↗
Country context: United States · Source checked: · Source date: 2024-05-14
- CDC · Treatment of E. coli infection ↗
Country context: United States · Source checked: · Source date: 2024-05-14
- CDC · Symptoms of E. coli infection ↗
Country context: United States · Source checked: · Source date: 2024-05-14
- CDC · Information for clinicians: E. coli ↗
Country context: United States · Source checked: · Source date: 2024-05-14
Related topics
Version and change history
- Written by
- Doktorclub editorial team
- Medically reviewed
- Dr. Murat Toktamışoğlu
- Reviewed on
- 14 October 2026
- Next review
- 14 April 2027
- Version
- 1.0.0
- — Medical and language review completed for this language version.
- — First sourced draft prepared; medical review pending.
Doktorclub editorial content · Prepared with AI assistance and reviewed for medical accuracy and language. Information supports, but does not replace, clinical assessment. This guide does not diagnose or create a personal medication plan. Report a content correction · Editorial standards