Abstract
The susceptibilities to Japanese encephalitis virus of 8 strains of C. tritaeniorhynchus, 7 domestic and 1 from Taiwan were studied quantitatively by the membrane feeding technique. Six which originated from the main islands of Japan (Honshu and Kyushu) and Okinawa had moderate susceptibilities to the virus. One strain from Amami Island was slightly more susceptible than the moderate strains and was 6-fold more susceptible than Taiwan strain. The differences were statistically significant but too small to perform genetic analysis for the susceptibility of the mosquito to the virus.