|
Simulium Argentatum
''Simulium'' is a genus of black flies, which may transmit diseases such as onchocerciasis (river blindness). It is a large genus with several hundred species, and 41 subgenera. The flies are pool feeders. Their saliva, which contains anticoagulants, a number of enzymes and histamine, is mixed with the blood, preventing clotting until it is ingested by the fly. These bites cause localized tissue damage, and if the number of feeding flies is sufficient, their feeding may produce a blood-loss anaemia. The host's reaction to fly attacks may include systemic illness, allergic reactions or even death, presumably mediated by histamine. In humans, this systemic reaction is known as "black fly fever" and is characterized by headaches, fever, nausea, adenitis, generalized dermatitis, and allergic asthma. Systematics Subgenera: * '' Afrosimulium'' Crosskey, 1969 * '' Anasolen'' Enderlein, 1930 * '' Asiosimulium'' Takaoka & Choochote, 2005 * '' Aspathia'' Enderlein, 1935 * '' Bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Simulium Trifasciatum
''Simulium'' is a genus of black flies, which may transmit diseases such as onchocerciasis (river blindness). It is a large genus with several hundred species, and 41 genus, subgenera. The flies are pool feeders. Their saliva, which contains anticoagulants, a number of enzymes and histamine, is mixed with the blood, preventing clotting until it is ingested by the fly. These bites cause localized tissue damage, and if the number of feeding flies is sufficient, their feeding may produce a blood-loss anaemia. The host's reaction to fly attacks may include systemic illness, allergic reactions or even death, presumably mediated by histamine. In humans, this systemic reaction is known as "black fly fever" and is characterized by headaches, fever, nausea, adenitis, generalized dermatitis, and allergic asthma. Systematics Subgenera: * ''Afrosimulium'' Roger Ward Crosskey, Crosskey, 1969 * ''Anasolen'' Günther Enderlein, Enderlein, 1930 * ''Asiosimulium'' Takaoka & Choochote, 2005 * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roger Ward Crosskey
Roger Ward Crosskey (29 January 1930 - 4 September 2017) was a British entomologist who worked at the Commonwealth Institute of Entomology and at the Natural History Museum in London specializing in blackflies ( Simuliidae), Tachinidae and the hymenopteran superfamily Evanioidea. Roger Crosskey was born in Croydon to Harold and Elfreda née Ward. His mother died of cancer when he was sixteen and after that spent a lot of his time outdoors collecting insects including butterflies and diving beetles. He studied at Whitgift School and his first publication was in 1951. He studied ensign wasps ( Aulacidae and Gasteruptiidae) for his master's degree from the University of London. He married Margaret Eileen ("Peggy") née Godfrey with whom he studied at college. Peggy was also an entomologist and worked alongside him throughout his career. Crosskey joined as an entomologist in the service of the Government of Northern Nigeria to study sleeping sickness in 1951. He also studied onchoc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
