<P> Clonorchiasis and opisthorchiasis (due to Opisthorchis viverrini) are particularly dangerous . They can survive for several decades in humans causing chronic inflammation of the bile ducts, epithelial hyperplasia, periductal fibrosis and bile duct dilatation . In many infections these symptoms cause further complications such as stone formation, recurrent pyogenic cholangitis and cancer (cholangiocarcinoma). Opisthorchiasis is particularly the leading cause of cholangiocarcinoma in Thailand and the Lao People's Democratic Republic . Both clonorchiasis and opisthorchiasis are classified as Group 1 human biological agents (carcinogens) by International Agency of Research on Cancer (IARC). </P> <P> Species of liver fluke include: </P> <Ul> <Li> Clonorchis sinensis (the Chinese liver fluke, or the Oriental liver fluke) </Li> <Li> Dicrocoelium dendriticum (the lancet liver fluke) </Li> <Li> Dicrocoelium hospes </Li> <Li> Fasciola hepatica (the sheep liver fluke) </Li> <Li> Fascioloides magna (the giant liver fluke) </Li> <Li> Fasciola gigantica </Li> <Li> Fasciola jacksoni </Li> <Li> Metorchis conjunctus </Li> <Li> Metorchis albidus </Li> <Li> Protofasciola robusta </Li> <Li> Parafasciolopsis fasciomorphae </Li> <Li> Opisthorchis viverrini (Southeast Asian liver fluke) </Li> <Li> Opisthorchis felineus (Cat liver fluke) </Li> <Li> Opisthorchis guayaquilensis </Li> </Ul> <Li> Clonorchis sinensis (the Chinese liver fluke, or the Oriental liver fluke) </Li>

Differentiate between the liver fluke and blood fluke