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Intrinsic factors affecting vector competence of mosquitoes for arboviruses.

that exist between the virus, the invertebrate host (vector), and the vertebrate host, each of which is influenced to varying degrees by environmental conditions. These interrela­ tionships have been reviewed elsewhere (17, 60,98, 109, 111, 113, 124) and are not discussed in depth here. Rather, this review focuses on vector competence or vector efficiency. Particular attention is given to recent studies that have contributed to our knowledge of intrinsic factors and mechanisms that control the ability of mosquitoes to vector arboviruses. No attempt is made to review transovarial transmission of arboviruses by ar­ thropods even though this is obviously an important aspect of vector com­ petence in certain arthropod-arbovi rus associations (35, 125, 140,