Loiasis is a filarial nematode infection, caused by a parasitic worm called Loa loa. Found in the Western and Central regions of Africa, this worm is transmitted by the day-flying tabanid flies. A symptom of this infection is calabar swellings that can affect various parts of the body. As the adult worm migrates, it releases allergens that causes the swelling. The infection can be detected through the worm’s subconjunctival migration across the eye. Although this can be an uncomfortable experience, it generally does not have any permanent damage. The infections lasts for about 1 to 3 days, but can be more severe in cases of visitors to the region.
HOW IS LOIASIS DIAGNOSED?
Prevention of the infection is possible through the use of insect repellents.