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6 Cards in this Set
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- Back
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Schistosome dermatitis
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swimmers itch; live in blood vessels and pass out in feces; humans after snail through skin; cercaria migrate under the skin' proteins from it induce inflammation which produces serpinginous tunnels; delayed hypersensitivity can cause persistence
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Schistosomiasis
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bilharzia; live in vessels around LI and bladder; miracidia hatch from eggs in water and develop into cercaria which penetrate and then develop schistosomula; produce little damage because they incorporate host ags onto their surface so they mimic; operculated eggs with single spine
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Clonorchiasis
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human liver trematodes; cercaria penetrate fish and develop into metacercariae which is passed to humans and migrates to liver/BD; tunnel into the liver; chronic inflammation leads to progressive fibrous thickening and biliary tract carcinomas; small thick shelled operculated eggs in iodine
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Paragonimiasis
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lung flukes; use crab and crayfish which are then ingested; rxn in lungs produce thin walled cysts around parasite which ruptures and causes calcification and spread of debris and eggs; thick shelled operculated eggs in blood tinged spit
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Fascioliasis
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sheep liver fluke and giant liver trematode; giant in humans and herbs; invade livers and BD after being ingested on vegetation; develop into adults in bile duct; adult and eggs destroy liver; ectopic infection sites; large THIN shelled operculated eggs in feces
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Mesocercarial visceral migrans
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tissue dwelling trem; use tadpoles and frogs to introduce to humans; larvae tunnel into tissues causing inflammation response with irritation; clinical or recovery of larvae; steroids; meso american i eat raw frogs and use steroids
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