[ong-koh-ser-kahy-uh-sis] /ˌɒŋ koʊ sərˈkaɪ ə sɪs/

noun, Pathology.
an infestation with filarial worms of the genus Onchocerca, common in tropical America and Africa, transmitted by black flies, and characterized by nodules under the skin, an itchy rash, eye lesions, and in severe cases, elephantiasis.
noun (pl) -ses (-siːz)
a disease found in parts of Africa and tropical America that is caused by a parasitic worm, Onchocerca volvulus, and transmitted to humans by various species of black fly. It results in inflammation of the skin and in some cases blindness Also called river blindness

onchocerciasis on·cho·cer·ci·a·sis (ŏng’kō-sər-kī’ə-sĭs) or on·cho·cer·co·sis (-sər-kō’sĭs)
A disease occurring in tropical Africa and Central America, transmitted by black flies and caused by infestation with filariform nematodes of the genus Onchocerca, especially O. volvulus, and characterized by nodular swellings on the skin and lesions of the eyes. Also called river blindness, volvulosis.


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