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Which of the following endoparasites of humans does show viviparity?

1. Enterobius vermicularis
2. Trichinella spiralis
3. Ascaris lumbricoides
4. Ancylostoma duodenale

Correct answer: Trichinella spiralis

Solution

Trichinella spiralis is viviparous: the adult female produces live larvae that enter host tissues. The other listed nematodes are oviparous and lay eggs.

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