Calabar swelling is produced by-: (A) Onchocerca volvulus, (B) Loa loa, (C) Brugia malayi, (D) Wuchereria bancrofti
Answer is B. Calabar Swelling: Localized angioedema and erythema usually on the extremities, characterized by fugitive, swollen lumps of subcutaneous tissue caused by a parasitic filarial worm (Loa loa) endemic to Central and West Africa.
The swollen areas migrate with the worm through the body at a speed of about 1 cm per minute and may become as large as a small egg.