A 36-year-old man who has been traveling through the orient is experiencing a tender region in the inguinal region. A blood film is made, and sheathed microfilariae with four to five subter-minal nuclei and two terminal nuclei in the tail are identified using Giemsa stain. The organism is most likely:
a. W. bancrofti.
b. Onchocerca volvulus.
c. Loa loa.
d. Brugia malayi.
D
B. malayi is the most likely organism. The Brugia spp. are distributed throughout the Far East, including China, Indonesia, Korea, Malaysia, Japan, India, and the Philippines. The B. malayi microfilariae are sheathed and contain four to five subterminal nuclei and two terminal nuclei in the tail.
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