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| Keywords: Clonorchis sinensis LifeCycle.png Clonorchiasis Clonorchis sinensis Causal Agent The trematode Clonorchis sinensis Chinese or oriental liver fluke Life Cycle Life cycle of Clonorchis sinensis Embryonated eggs are discharged in the biliary ducts and in the stool Eggs are ingested by a suitable snail intermediate host ; there are more than 100 species of snails that can serve as intermediate hosts Each egg releases a miracidia which go through several developmental stages sporocysts rediae and cercariae The cercariae are released from the snail and after a short period of free-swimming time in water they come in contact and penetrate the flesh of freshwater fish where they encyst as metacercariae Infection of humans occurs by ingestion of undercooked salted pickled or smoked freshwater fish After ingestion the metacercariae excyst in the duodenum and ascend the biliary tract through the ampulla of Vater Maturation takes approximately 1 month The adult flukes measuring 10 to 25 mm by 3 to 5 mm reside in small and medium sized biliary ducts In addition to humans carnivorous animals can serve as reservoir hosts Geographic Distribution Endemic areas are in Asia including Korea China Taiwan and Vietnam Clonorchiasis has been reported in non endemic areas including the United States In such cases the infection is found in Asian immigrants or following ingestion of imported undercooked or pickled freshwater fish containing metacercariae http //www dpd cdc gov/dpdx/images/ParasiteImages/A-F/Clonorchiasis/Clonorchis_LifeCycle gif PD-USGov File Clonorchis sinensis LifeCycle-french svg Clonorchis s life cycle Original upload log wikitable - - 2006-05-10 18 38 10 562 × 435 29271 bytes Patho <nowiki> Clonorchiasis Clonorchis sinensis Causal Agent The trematode Clonorchis sinensis Chinese or oriental liver fluke Life Cycle Life cycle of Clonorchis sinensis Embryonated eggs are discharged in the biliary ducts an</nowiki> CDC lifecycles Clonorchis s life cycle | ||||
