Organism causing billiary duct obstruction:
Clonorchis sinensis
Ankylostoma duodenale
Strongyloides stercales
Enterobius vermicularis
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