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16 Schistosome life cycle
Egg cercariae Snail- intermediate host Schistosoma 17
17 Egg Schistosoma Snail- intermediate host cercariae
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Cercariae released by snail A=Infective Stage Sporocysts in snail (4 into water and free-swimming A=Diagnostic Stage (successive generations) A Cercariae lose tails during penetration and become schistosomula Penetrate Circulation Miracidia penetrate snail tissue A Migrate to portal blood d in liver and mature into adults(9 in feces d in urine c Eggs hatch releasing miracidia 10 Paired adult worms migrate to S. mansoni S haematobium liver and shed in sto c venous plexus 醫中藥網 Www.zhoNg-yao.Net
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