Question

Microfilariae with sheathed tail and two nuclei at the tail is suggestive of. 

• A. Wuchereria bancrofti
• B. Brugia malay
• C. Loa loa
• D. Onchocerca volvulus

Answer 1

The Correct Option is B

The microfilariae with a sheathed tail and two nuclei at the tail are suggestive of Brugia malayi. Microfilariae are the larval stage of filarial worms, and their detection can aid in diagnosing the type of filarial infection. The distinguishing features of microfilariae are crucial in identifying the specific causative species. Below are key comparative features:

Species	Sheathed	Nuclei in Tail
Wuchereria bancrofti	Yes	No distinct terminal nuclei
Brugia malayi	Yes	Two distinct nuclei in the tail
Loa loa	Yes	No distinct terminal nuclei
Onchocerca volvulus	No	No terminal nuclei

From the table, Brugia malayi is the only species with both a sheathed microfilariae and two nuclei in the tail, making it the correct answer.