Abstract
Females of Culex univittatus, Culex poicilipes, Aedes circumluteolus, Aedes calceatus, Aedes simpsoni and Aedes aegypti , originating from populations in southern Africa, were tested for infection rates and ability to transmit chikungunya virus between vervet monkeys, Cercopithecus aethiops . The first species failed to transmit the virus and, with the exception of Ae. simpsoni , infection rates were low. With Ae. aegypti 3.0 logs of virus failed to infect whereas at 5.3 logs 74–92% were infected. After 21 days the transmission rate with this species was 78% and after 49 days 12%. Despite the lower transmission rate there was no definite evidence that the level of virus in the mosquito had decreased at the latter time.
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