Fasciolopsiasis

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Fasciolopsiasis

ORPHA:658909Disease

What it is

A rare parasitic disease characterized by infection with the intestinal parasitic flatworm Fasciolopsis buski by ingestion of metacercariae via undercooked contaminated aquatic plants or contaminated water. Adult worms are the largest flukes infecting humans and attach to and ulcerate the mucosa of the proximal small bowel. Patients may be asymptomatic or present abdominal pain, vomiting, diarrhea, and signs of malabsorption, potentially also intestinal obstruction, 30 to 60 days after exposure. Peripheral eosinophilia may be observed. Severe malabsorption may lead to edema and ascites due to protein loss.

Key facts

Inheritance
Not applicable
Classified as
Disease

ICD-10 codes

B66.5ICD-10 names this disease exactly — shared with 1 other rare disease

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Cross-references

MEDDRA 10016235MONDO 0004672MONDO 4672UMLS C0015656

Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.

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