What is Bali Belly (Traveler's Diarrhea)?
Traveler's diarrhea, commonly called Bali Belly, results from ingesting pathogens from contaminated food or water. It affects 20-50% of international travelers to developing countries and causes symptoms including diarrhea, nausea, vomiting, abdominal cramps, and dehydration.
Common causes
- Enterotoxigenic E. coli (ETEC) - Most common bacterial cause (40-60% of cases)
- Salmonella, Campylobacter - Bacterial infections from contaminated food
- Norovirus - Viral gastroenteritis (highly contagious)
- Giardia lamblia - Parasitic infection from contaminated water
Common symptoms
- Frequent watery diarrhea (3+ times per day)
- Nausea and vomiting
- Abdominal cramps and bloating
- Fever (sometimes)
- Dehydration (dry mouth, fatigue, dizziness)
When to seek hospital care immediately
- • High fever >38.5°C (101.3°F)
- • Bloody or black stools
- • Signs of severe dehydration (no urination, extreme weakness)
- • Fainting or confusion
- • Severe abdominal pain
- • Symptoms persisting >3 days
For a full breakdown of warning signs and home-care guidance, see what to do if symptoms come back after treatment.
Clinical Evidence
IV rehydration therapy is recommended by the CDC Yellow Book and the WHO for moderate to severe traveler's diarrhea cases with dehydration. Clinical guidance from travel medicine bodies notes that IV therapy can meaningfully shorten recovery time compared to oral rehydration alone and provide faster symptom relief.