All of the following can cause obstruction of hepatobiliary system EXCEPT
Ankylostoma * The adult parasites live in the small intestine of man, mostly in the jejunum, less frequently in duodenum and infrequently in the ileum. * Ascaris and liver flukes are known to cause biliary obstruction.
Ankylostoma duodenale
Ascaris lumbricoides
Clonorchis sinensis
Fasciola hepatica