A child from Bihar was brought to OPD with fever. On blood examination,sheathed microfilaria with two nuclei in tail tip is seen . The diagnosis is:
This is the characteristic feature of microfilaria of Brugia malayi. Adults localise in the lymphatics and female lays microfilaria Shows nocturnal periodicity, Sheathed, have a non-continuous row of blurred nuclei throughout the length of the body. There are two terminal nuclei in the tail that are distinctly separated from the other nuclei.
B.malayi
W.bancrofti
Loa loa
Oncocerca volvulous
Parasitology Pa 2 (Helminthology)