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Which of the following is the larva of Culex which causes Filariasis?(a) Filariform larva(b) Microfilaria larva(c) Trichinella larva(d) Dracunculus larvaThis question was posed to me during an online interview.My question is from Helminthic Diseases in Humans-2 in section Human Health and Disease of Biology – Class 12

Answer» RIGHT option is (b) Microfilaria larva

To explain: In the salivary glands of CULEX, microfilaria larva is present. When Culex bites a person, this larva reaches the lymphatic SYSTEM CHANGING into ADULT forms. At night, larva reaches into the blood and in the day, it reaches the lymphatic vessels. Therefore, the night blood examination can reveal the parasite.


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