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Explosive Diarrhea Bug Spreads to Britain
30 Jul
Summary
- Cyclosporiasis infections increase in the UK, affecting returning travelers.
- The illness is caused by a microscopic parasite called Cyclospora cayetanensis.
- Symptoms include explosive diarrhea, fatigue, and body aches, lasting weeks.

A parasitic outbreak causing explosive diarrhea has been confirmed in the UK, marking an increase in cyclosporiasis infections. These cases are predominantly linked to travelers returning from Mexico, mirroring a similar surge in the United States.
The microscopic parasite, Cyclospora cayetanensis, is responsible for the illness. Infection occurs through the consumption of contaminated food or water. Symptoms typically appear about a week after exposure and can include severe diarrhea, loss of appetite, fatigue, and body aches.
While most healthy individuals recover, the illness can be severe for young children, older adults, and those with weakened immune systems. Symptoms may persist for several weeks even after the parasite is cleared. Diagnosis involves stool sample testing, and the recommended treatment is a course of antibiotics.