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Solution


Q.

Which of the following endoparasites of humans does show viviparity               [2015]
1 Trichinella spiralis  
2 Ascaris lumbricoides  
3 Ancylostoma duodenale  
4 Enterobius vermicularis  

Ans.

(1)

Trichinella spiralis is a minute nematode parasite that shows viviparity i.e., produces live youngs (larvae) not eggs. The adults of T. spiralis live in the human small intestine, where the females release large numbers of larvae. These larvae bore through the intestine and can cause trichinosis or trichiniasis which has symptoms like diarrhoea, nausea, vertigo, pain in limbs and fever etc.