General Parasitology and Helminthology: Diphyllobothrium latum

Diphyllobothrium latum

Subclass	Cotyloda
Order	Diphyllidea
Family	Diphyllobothridae
Genus	Diphyllobothrium
Species	D. latum
Common name	Broad fish tape worm
Host	Man, dog, cat, pigs, and other fish eating mammals
Location	Small intestine
I/H	1^st I/H - Cyclops (Diaptomus gracilis – copepod crustaecean). 2^nd I/H – Fresh water fish. (Pike, trout and perch)
Morphology	Worms are medium to large in size, scolex has a narrow week, deep muscular groove known as “Bothria” (hold fast organ) situated on both dorsal and ventral side. Scolex is unarmed and almond in shape. Each segment contain single set of reproductive organs. Genital pore and uterine pore open separately on the ventral aspect, whereas in mesocestoides, there is no separate uterine pore. Ovary is bilobed. Vitelline gland and testes distributed in the lateral margin of segment. In the gravid segment uterus is spiral tube in shape.

Last modified: Tuesday, 19 June 2012, 7:31 AM

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VPA 211: General Veterinary Parasitology and Helminthology (3+1)

Diphyllobothrium latum

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