Cestode Infections – Flashcards
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| Diphyllobothrium latum |
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| fish tapeworm |
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| Diphyllobothrium latum |
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| human and fish eating mammals reservoirs and definitive hosts |
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| Diphyllobothrium latum |
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| CORACIDIUM LARVAE eggs hatch in water, ingested by crustaceans, develop into PROCERCOID LARVAE. Crustacean ingested by fish, plerocercoid larvae develop in muscles. Humans eat fish. Worms marture in SMALL INTESTINE |
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| Diphyllobothrium latum |
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| mechanical mucosa irritation=abdominal discomfort toxins cause peripheral and spinal nerve degeneration |
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| Diphyllobothrium latum |
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| GI symptoms + PERNICIOUS ANEMIA |
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| Diphyllobothrium latum |
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| thin shelled, ovoid, OPERCULATED EGGS |
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| Dipylidium caninum |
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| humans + mammals reservoir/definitive host fleas and lice intermediate host |
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| Dipylidium caninum |
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| dog tapeworm human infection in children ingesting fleas or lice |
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| Dipylidium caninum |
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| flea larvae or louse nymphs ingest ONCHOSPHERE egg balls, develop into CRYSTICERCOID LARVAE in adult fleas/lice. Dogs/humans ingest adult fleas/lice. Adult worm develops in SMALL INTESTINE. |
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| Dipylidium caninum |
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| attach via SPINES on rostellum to mucosa. METABOLIC BY-PRODUCTS cause bleeding, inflammation, hemorrhagic enteritis |
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| Dipylidium caninum |
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| GRAVID PROGLOTTIDS migrate out of anus. or egg packets with ONCHOSPHERES recovered in feces |
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| Hymenoleopsis nana |
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| does not require an intermediate host |
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| Hymenolepsis diminuta |
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| requires beetles and fleas ingesting egg to develop |
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| Hymenolepiasis |
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| insects ingest ONCHOSPHERES, which develop into CYSTICERCOID LARVAE. Human ingest infected insects. Adult tapeworm develops in small intestine. |
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| Hymenolepiasis |
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| large number of worms and their metabolic wastes needed to cause damage. |
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| Hymenolepiasis |
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| ovoid, thin shelled eggs containing onchospheres |
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| Taenia solium |
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| pork tapeworm |
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| Taeniarhynchus saginatus |
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| beef tapeworm |
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| Taeniasis |
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| Ingest: onchospheres, develop into CYSTICERCUS CELLULOSAE LARVAE in body tissue |
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| Taeniasis |
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| cysticerus cellulosae cause nervous system problems. Adult worms cause GI symptoms |
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| Taeniasis |
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| eggs with hexacanth embryos and radially striated shells |
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| Hymenolepiasis |
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| GI symptoms + eosinophila, convulsions, and toxemia |
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| Taeniasis |
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| adult worms produce intestinal obstruction, inflammation, and irritation at site of scolex attachment. |
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| Taeniasis (T. splium) |
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| cystecercus cellulosae displaces tissue, leading to caseation and calcification of infected tissues. |
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| Diphyllobothrium latum |
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| adult worms grow 12 meters with >3000 proglottids |
