The disease is treated with the drug diethylcarbamazine (DEC), and when appropriate, surgical methods may be employed to remove adult worms from the conjunctiva. The disease can cause red itchy swellings below the skin called "Calabar swellings". Loa loa does not normally affect one's vision but can be painful when moving about the eyeball or across the bridge of the nose. The adult Loa loa filarial worm migrates throughout the subcutaneous tissues of humans, occasionally crossing into subconjunctival tissues of the eye where it can be easily observed. Humans contract this disease through the bite of a deer fly or mango fly ( Chrysops spp.), the vectors for Loa loa. Loa loa filariasis is a skin and eye disease caused by the nematode worm Loa loa. Loa loa microfilaria in thin blood smear (Giemsa stain) Loiasis, loaiasis, Calabar swellings, fugitive swelling, tropical swelling, : 439 African eyeworm
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