<prompt> Calabar swelling is due to -Hypersensitivity to adult worm of Loa-LoaHypersensitivity to larva of Loa-LoaHypersensitivity to adult worm of oncocercaHypersensitivity to larva of oncerca  <response>: Ans. is a i.e., Hypersensitivity to adult worm of Loa-Loa Ref: Chatterjee 12thIe p. 202Loiasis Loiasis is caused by L. Loa the African eye worm Habitat of adult worms is subcutaneous connective tissue of man; often in the sub-conjuctival tissue of the eye. The worm passes its life cycle in two hosts : Man Chrysops Mango or deer flies It causes a characteristic subcutaneous swelling called Calabar fugitive swelling. It is due to hypersensitivity reaction to adult worm. 