Which of the following does not cause biliary tract obstruction ?: (A) Ascaris lumbricoides, (B) Ankylostoma duodenale, (C) Clonorchis sinensis, (D) Fasciola hepatia
Answer is B. Pathogenesis and clinical features of ankylostoma duodanale Infective agent: filariform larvae Poal of entry: skin The worm causes hookworm disease in man characterized mainly by anaemia. (refer pgno:144 baveja 3 rd edition)