Prepared by: Reem Al dossari Taenia Prepared by: Reem Al dossari

Taenia External Features: Kingdom:Animalia Subkingdom:eumetazoa Class:Cestoda Order:Cyclophllidea Genus:Taenia Species:Taenia saginata (beef tape­worm) Taenia solium (pork tapeworm) External Features: Tatnia saginata has four large muscular suckers; no mouth or hooks exist. Scolex of T. solium is relatively smaller and has a rounded prominent rostellum with a double row of chitinous hooks.

T. solium T. saginata human Definitive host pig cattle Intermediate host found in the muscles or subcutaneous tissues of their intermediate host (generally, pigs). in the cow after ingestion of the worm eggs Larvae contains the uterus (unbranched), overy, genital pore, and testes The Mature Proglottis T. solium uterus is less branched (7-to main branches on each side). the uterus in T. saginata is branched and is filled with eggs. (20-30 main branches on each side The Gravid Proglottids similar Eggs It takes about 5 to 12 weeks for the worm to mature into adulthood in the human intestine. Usually only a single worm is present at time Incubation Period

The Mature Proglottis

Life Cycle:

The Egg

1-Rostellum 2-Hooks 3-Suckers Scolex of Taenia solium 1-Rostellum 2-Hooks 3-Suckers

T. saginata 1-Suckers

Taenia (Mature Proglottis) 2 3 4 5 1 6 Taenia (Mature Proglottis) 1- Ovary 2- testes 3-uterus 4- vas deferens 5- vagina 6-genetal atrium

1 2 Gravid Proglottids) 1-utreus 2- eggs

Gravid Proglottids) T. solium T. saginata

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