Fasciolopsis buski infection [ Giant Intestinal Fluke ] may cause no symptoms when mild. When symptoms occur, they can include:

- Watery or persistent diarrhea
- Abdominal pain, bloating, nausea, or vomiting
- Loss of appetite and weight loss
- Fatigue or weakness
- Swelling of the legs, face, or abdomen from protein loss
- Anemia or malnutrition in heavy infections

Rarely, a severe infection can cause intestinal blockage or other serious complications.

People typically acquire it by eating raw or undercooked freshwater plants, such as water chestnuts or watercress, from regions where the parasite occurs, mainly parts of East and Southeast Asia. A clinician can prescribe effective treatment, commonly praziquantel.

Seek urgent care for severe or worsening abdominal pain, persistent vomiting, a swollen abdomen, inability to pass stool or gas, or significant swelling. A flat brown object alone cannot confirm *F. buski*, so stool testing is important.