oa African Entomology - An electron microscopical study of Rift Valley fever and Sindbis viral infection in mosquito salivary glands (Diptera: Culicidae)

Volume 6, Issue 1
  • ISSN : 1021-3589



Aedes aegypti Linnaeus and Culex theileri Theobald were infected by intrathoradc inoculation with Sindbis virus, while Aedes circumluteolus (Theobald) was infected with Rift Valley fever virus. After a lengthy incubation period of 45-63 days, the salivary glands were removed and studied by transmission electron microscopy. No pathological changes or damage was observed. Arrays of Sindbis virus particles were present in both Ae. aegypti and Cx. theileri, associated with distended endoplasmic reticulum but no virions were seen within vacuoles. Virions occurred freely in the cytoplasm in Cx. theiferi but not in Ae. aegypti. In Aedes circumluteolus, arrays of Rift Valley fever virus that accumulated in the cytoplasm were being released into the salivary duct through microvilli.

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