Classification: ICD-9 123.4; ICD-10 B70.0

Syndromes and synonyms: Diphyllobothriosis, Dibothriocephaliasis, broad or fish tapeworm infection

Agent: The cestode Diphyllobothrium latum (fish or broad tapeworm), the largest human tapeworm (up to 25 meters long). In Japan and eastern Russia D. nihonkaiense is common. At least 13 other Diphyllobothrium species have been reported to infect humans, but less frequently.

Reservoir: In addition to humans, dogs and fish-eating terrestrial and marine mammals can also serve as definitive hosts for D. latum.

Transmission: Consumption of raw or undercooked freshwater fish containing infectious larvae. There is no direct person-to-person transmission.

Cycle

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