system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Organism causing billiary duct obstruction:
assistant
The correct answer is  Hepatobiliary Parasitism
Common in Southern china
Biliary tract is infestated by adult helminthes or their ova
Causes :
Trematodes (Liver or biliary flukes) MC
Clonorchis sinensis
Opisthorchis viverrini or O. felineus
Fasciola hepatica
Nematode (Ascaris lumbricoides by intraductal migration of adult worm