Experimental Studies on Susceptibility of Aedes togoi with Brugia malayi in Cheju-Island, Korea

Abstract

Many studies have been reported on the role of various kinds of mosquitos in tbe transmis• sion of malayan filariasis in the different localities in the world. In Japan, A. fogoi was proved from the evidences of natural and experimental infections by the species of this filaria as the most important vector of Brugia malayi in a small islet called Hachijo -Koshima, where was only known endemic area of malayan type of filariasis in the country (Sasa, 1966). Several field observations on the role of A. fogoi of malayan filariasis in Cheju-Island, Korea have been conducted by some workers: Lee et al. (1964) reported one of the females of A. fogoi, infected with two mature larvae and one sausage form larva of B. malayi in Cheju-Island. Chun(1968) also described that the natural infection rates with larvae of all stages were from 2.5% to 9.7% according to the areas surveyed. Recently, Katamine et al. (1970) have reported that a total of 27 from 308 A. fogoi examined were found in fected with mature larvae and only two from 504 Culex pipieηs pallens harboured young larvae in Cheju-Island. From the above observations on the natural infections, it is evident that A. fogoi plays a great role as an * This research was supported in part during the first stage of the study by the U. S. Army Research and Development Group (Far East), Department of the Army under Grant No. DA-RDRF•S92-544-72-GI89. important vector of malayan filariasis in Cheju•Do. In this sense , authors attempted to carry out the laboratory infections of A. fogoi with B. malayi in order to know the susceptibility of the local strain to the parasite at Cheju Island.