The organism causing biliary duct obstruction?: (A) Clonorchis sinensis, (B) Ankylostoma duodenale, (C) Strongyloides stercoralis, (D) Enterobius vermicularis
Answer is A. Hepatobiliary ParasitismCommon in Southern China Biliary tract is infested by adult helminths or their ovaCauses:Trematodes (Liver or biliary flukes): Most CommonClonorchis sinensisOpisthorchis viverrini or O. felineusFasciola hepaticaNematode (Ascaris lumbricoides by intraductal migration of adult worm)