Abstract
The natural infection of mosquitoes with the viruses of Getah complex was studied in Fukuoka area in the period from 1963 to 1972. During the period, virus isolation attempts were held with 205,095 females of Culex tritaeniorhynchus Giles and 7,636 females of the other four species of mosquitoes, and 254 isolates were obtained. All the isolates came from the C. tritaeniorhynchus mosquitoes. Nine of them were tentatively identified as the viruses of Getah complex through the hemagglutination-inhibition tests. The results of the perennial searches for the viruses in the mosquitoes showed that the natural infection with the viruses occasionally took place among C. tritaeniorhynchus mosquitoes but never became prevalent among them in the area.
