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Vector Competence of Three Australian Mosquitoes, <I>Verrallina carmenti</I>, <I>Verrallina lineata</I>, and <I>Mansonia septempunctata</I> (Diptera: Culicidae), for Ross River Virus

2008; Oxford University Press; Volume: 45; Issue: 4 Linguagem: Inglês

10.1603/0022-2585(2008)45[737

ISSN

1938-2928

Autores

Cameron E. Webb, Stephen L. Doggett, Scott A. Ritchie, Richard C. Russell,

Tópico(s)

Insect symbiosis and bacterial influences

Resumo

The vector competence of Verrallina carmenti (Edwards), Verrallina lineata (Taylor), and Mansonia septempunctata (Theobald) (Diptera: Culicidae) from north Queensland, Australia, was tested using two isolates of Ross River virus (family Togaviridae, genus Alphavirus, RRV). All three species were tested using RRV isolate RR102MP (ex-Cairns, Queensland, Australia), whereas Ve. carmenti and Ve. lineata also were tested using RR2186 (ex-Bourke, New South Wales, Australia). Transmission was tested using the capillary tube method, with infection of mosquito bodies and saliva determined using cell culture. Infection with RR102MP resulted in 27.5% of Ve. carmenti, 19.2% of Ve. lineata and 13.3% of Ma. septempunctata transmitting virus. When Ve. carmenti and Ve. lineata were infected with RR2186, transmission rates for both species were generally < 10%, although a transmission rate of 25% was recorded for Ve. lineata exposed to high titer virus. These results indicated that the three mosquito species have the potential to contribute to local transmission cycles.

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