Comparison of the susceptibility to chikungunya virus on 2 strains of Aedes albopictus

The susceptibility of 2 strains (Oahu and Hyogo strains) of Aedes albopictus to oral infection with chikungunya virus was compared. These strains showed different infection threshold and final content of the virus. Oahu strain was much susceptible than the Hyogo strain. Virus titers in individual mosquito of the Hyogo strain on 14th day post-infection ranged continuously between (10)^1 and (10)^3 PFU per mosquito. On the contrary, those of the Oahu strain were fallen into 3 groups such as negative (non-infective), low virus titer ((10)^3-(10)^4 PFU) and high virus titer ((10)^6-(10)^7 PFU).