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Onchocerca
Onchocerca is a genus of parasitic roundworm. It contains one human parasite – ''Onchocerca volvulus'' – which is responsible for the neglected disease Onchocerciasis, also known as "river blindness" because the infected humans tend to live near rivers where host black flies live. Over 40 million people are infected in Africa, Central America, and South America. , Indiana State University. Accessed 14 February 2008. Other species affect cattle, horses, etc. List of species *'' Onchocerca armillata'' *''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onchocerca Volvulus
''Onchocerca volvulus'' is a filarial (arthropod-borne) nematode (roundworm) that causes onchocerciasis (river blindness), and is the second-leading cause of blindness due to infection worldwide after trachoma. It is one of the 20 neglected tropical diseases listed by the World Health Organization, with elimination from certain countries expected by 2020. John O’Neill, an Irish surgeon, first described ''Onchocerca volvulus'' in 1874, when he found it to be the causative agent of ‘craw-craw’, a skin disease found in West Africa. A Guatemalan doctor, Rodolfo Robles, first linked it to visual impairment in 1917. ''O. volvulus'' is primarily found in sub-Saharan Africa, and humans are the only known definitive host; there is also disease transmission in some South American nations, as well as Yemen (see global map bottom right). It is spread from person to person via female biting blackflies of the genus ''Simulium''. Morphology ''O. volvulus'' parasites obtain nutrients f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onchocerca Fasciata
Onchocerca is a genus of parasitic roundworm. It contains one human parasite – ''Onchocerca volvulus'' – which is responsible for the neglected disease Onchocerciasis, also known as "river blindness" because the infected humans tend to live near rivers where host black flies live. Over 40 million people are infected in Africa, Central America, and South America. , Indiana State University. Accessed 14 February 2008. Other species affect cattle, horses, etc. List of species *'' Onchocerca armillata'' *''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onchocerca Jakutensis
Onchocerca is a genus of parasitic roundworm. It contains one human parasite – ''Onchocerca volvulus'' – which is responsible for the neglected disease Onchocerciasis, also known as "river blindness" because the infected humans tend to live near rivers where host black flies live. Over 40 million people are infected in Africa, Central America, and South America. , Indiana State University. Accessed 14 February 2008. Other species affect cattle, horses, etc. List of species *'' Onchocerca armillata'' *''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onchocerca Ramachandrini
Onchocerca is a genus of parasitic roundworm. It contains one human parasite – ''Onchocerca volvulus'' – which is responsible for the neglected disease Onchocerciasis, also known as "river blindness" because the infected humans tend to live near rivers where host black flies live. Over 40 million people are infected in Africa, Central America, and South America. , Indiana State University. Accessed 14 February 2008. Other species affect cattle, horses, etc. List of species *'' Onchocerca armillata'' *''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onchocerca Ochengi
Onchocerca is a genus of parasitic roundworm. It contains one human parasite – ''Onchocerca volvulus'' – which is responsible for the neglected disease Onchocerciasis, also known as "river blindness" because the infected humans tend to live near rivers where host black flies live. Over 40 million people are infected in Africa, Central America, and South America. , Indiana State University. Accessed 14 February 2008. Other species affect cattle, horses, etc. List of species *'' Onchocerca armillata'' *''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onchocerca Linealis
Onchocerca is a genus of parasitic roundworm. It contains one human parasite – ''Onchocerca volvulus'' – which is responsible for the neglected disease Onchocerciasis, also known as "river blindness" because the infected humans tend to live near rivers where host black flies live. Over 40 million people are infected in Africa, Central America, and South America. , Indiana State University. Accessed 14 February 2008. Other species affect cattle, horses, etc. List of species *'' Onchocerca armillata'' *''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onchocerca Armillata
Onchocerca is a genus of parasitic roundworm. It contains one human parasite – ''Onchocerca volvulus'' – which is responsible for the neglected disease Onchocerciasis, also known as "river blindness" because the infected humans tend to live near rivers where host black flies live. Over 40 million people are infected in Africa, Central America, and South America. , Indiana State University. Accessed 14 February 2008. Other species affect cattle, horses, etc. List of species *'' Onchocerca armillata'' *''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onchocerca Cervicalis
Onchocerca is a genus of parasitic roundworm. It contains one human parasite – ''Onchocerca volvulus'' – which is responsible for the neglected disease Onchocerciasis, also known as "river blindness" because the infected humans tend to live near rivers where host black flies live. Over 40 million people are infected in Africa, Central America, and South America. , Indiana State University. Accessed 14 February 2008. Other species affect cattle, horses, etc. List of species *'''' *''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onchocerca Dukei
Onchocerca is a genus of parasitic roundworm. It contains one human parasite – ''Onchocerca volvulus'' – which is responsible for the neglected disease Onchocerciasis, also known as "river blindness" because the infected humans tend to live near rivers where host black flies live. Over 40 million people are infected in Africa, Central America, and South America. , Indiana State University. Accessed 14 February 2008. Other species affect cattle, horses, etc. List of species *'''' *'' |
Onchocerca Flexuosa
Onchocerca is a genus of parasitic roundworm. It contains one human parasite – ''Onchocerca volvulus'' – which is responsible for the neglected disease Onchocerciasis, also known as "river blindness" because the infected humans tend to live near rivers where host black flies live. Over 40 million people are infected in Africa, Central America, and South America. , Indiana State University. Accessed 14 February 2008. Other species affect cattle, horses, etc. List of species *'' Onchocerca armillata'' *''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onchocerciasis
Onchocerciasis, also known as river blindness, is a disease caused by infection with the parasitic worm ''Onchocerca volvulus''. Symptoms include severe itching, bumps under the skin, and blindness. It is the second-most common cause of blindness due to infection, after trachoma. The parasite worm is spread by the bites of a black fly of the ''Simulium'' type. Usually, many bites are required before infection occurs. These flies live near rivers, hence the common name of the disease. Once inside a person, the worms create larvae that make their way out to the skin, where they can infect the next black fly that bites the person. There are a number of ways to make the diagnosis, including: placing a biopsy of the skin in normal saline and watching for the larva to come out; looking in the eye for larvae; and looking within the bumps under the skin for adult worms. A vaccine against the disease does not exist. Prevention is by avoiding being bitten by flies. This may include the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onchocerca Lupi
''Onchocerca lupi'' is a nematode that causes ocular onchocerciasis, an eye disease, in canines and felines. The parasite was first described in 1967 in a wolf from Georgia. The other ''Onchocerca'' spp., '' O. volvulus'', is a human parasite that causes ocular onchocerciasis in human and affects 37 million people globally.Otranto, Domenico, et al. "Human ocular filariasis: further evidence on the zoonotic role of Onchocerca lupi." ''Parasit Vectors'' 5.1 (2012): 84. The male ''O. lupi'' worms are smaller in size than the females. Males are 43–50 mm in length and 120-200 µm in diameter. Females are 275-420 µm in diameter but the total length are unknown while the longest fragments recorded were 160–165 mm. They both are fragile and slender. Life cycle The complete life cycle of ''O. lupi'' is still unknown. The black fly, ''Simulium tribulatum'', is reported as a putative vector. Human Cases The number of reported human zoonotic ''O. lupi'' infectio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
