Loiasis is a chronic parasitic infection with the filarial nematode Loa loa. The organism is a common cause of illness in West Africa, particularly along the coastal plains, where about 8% to 9% of the population have microfilariae in their peripheral blood.1
A 32-year-old man from Lagos, Nigeria, came to the emergency room of the University of Minnesota Hospitals, complaining of "worms biting my stomach." He left Nigeria in 1967, eight years prior to his coming to the emergency room; he had been well until 1971, when he felt something move across his eye. He was seen by a physician at that time, but attempts to secure the worm failed. Physical examination here disclosed discomfort in the left subcostal region but no cutaneous or other abnormality. The eosinophil count was 8%, and a blood smear taken in the early afternoon showed no microfilariae. No treatment was given
Sacks HN, Williams DN, Eifrig DE. Loiasis: Report of a Case and Review of the Literature. Arch Intern Med. 1976;136(8):914–915. doi:10.1001/archinte.1976.03630080050015
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