tchenku midshipman 18598 Posts user info edit post |
Quote : | "Onchocerciasis (/'??k?s?r'sa?.?s?s/ or /'??k?s?r'ka?.?s?s/), also known as river blindness and Robles disease, is a parasitic disease caused by infection by Onchocerca volvulus, a nematode (roundworm).[1] Onchocerciasis is second in the world only to trachoma as an infectious cause of blindness.[1] It is not the nematode, but its endosymbiont, Wolbachia pipientis, that causes the severe inflammatory response that leaves many blind.[2] The parasite is transmitted to humans through the bite of a black fly of the genus Simulium. The larval nematodes spread throughout the body. When the worms die, their Wolbachia symbionts are released, triggering a host immune system response that can cause severe itching, and can destroy optical tissue in the eye.[3]" |
2/3/2013 7:37:50 AM
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