Two new cytoforms of the Simulium damnosum complex (Diptera: Simuliidae) from Malawi and Tanzania and potential onchocerciasis vectors


Kruger, A; Kalinga, AK; Post, RJ; Maegga, BTA; (2004) Two new cytoforms of the Simulium damnosum complex (Diptera: Simuliidae) from Malawi and Tanzania and potential onchocerciasis vectors. Tropical medicine & international health, 9 (7). pp. 805-811. ISSN 1360-2276 DOI: https://doi.org/10.1111/j.1365-3156.2004.01270.x

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Abstract

During a distribution survey of Simulium damnosum s.l. around the Tukuyu onchocerciasis focus at the northern tip of Lake Malawi/Nyasa (Tanzania), we discovered two new cytoforms of the S. damnosum complex in onchocerciasis-free areas. The Nyika form is related to Simulium thyolense, a vector of onchocerciasis, and can be identified by the new inversion 3L-L on the long arm of chromosome 3. It was found breeding in five rivers in northern Malawi and neighbouring Tanzania and is assumed to be zoophilic. The Njombe form represents a member of the Sanje group of the complex and is characterized by the new diagnostic inversion 2L-35 on chromosome 2. So far, it is only known from around Njombe town in southern Tanzania, where it breeds at remarkably high altitudes. Anthropophily for the Njombe form is well known. The medical importance and systematic position of the new forms within the S. damnosum complex are discussed.

Item Type: Article
Keywords: Altitude, Animals, Ecosystem, Female, Insect Vectors, Malawi, Male, Onchocerciasis, Phenotype, Polymorphism, Genetic, Research Support, Non-U.S. Gov't, Simuliidae, Tanzania, Altitude, Animals, Ecosystem, Female, Insect Vectors, genetics, Malawi, Male, Onchocerciasis, transmission, Phenotype, Polymorphism, Genetic, genetics, Research Support, Non-U.S. Gov't, Simuliidae, classification, genetics, Tanzania
Faculty and Department: Faculty of Infectious and Tropical Diseases > Dept of Disease Control
PubMed ID: 15228490
Web of Science ID: 222426100007
URI: http://researchonline.lshtm.ac.uk/id/eprint/11070

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