云南白纹伊蚊感染,传播登革和乙型脑炎病毒的研究

云南株白纹伊蚊通过吸食含病毒的血餐或叮吸有病毒血症的小鸡血，能感染登革和乙型脑炎病毒，并能在蚊体内增殖。感染蚊经叮咬吸血，能将这两种病毒传播给乳鼠或小鸡。雌蚊感染后第10天，对乳鼠的传播率登革1、2、3、4型和乙型脑炎依次为22．22％、37．50％、25．00％、44．44％和37．50％；对小鸡的传播率登革4型和乙型脑炎分别为100％和66．67％。实验结果表明，白纹伊蚊在登革和乙型脑炎病毒保存和传播中起重要作用。

Infection and Transmission of Dengue and Japanese Encephalitis Viruses in Yunnan Strain of Aedes albopictus

The studies showed that Yunnan strain of Aedes albopictus could be infected and multiply dengue (DEN) and Japanese encephalitis (JE) viruses in their bodies by ingesting blood-virus meal,or biting viremic chickens. Infected female mosquitoes were capable of transmitting DEN and JE virusesto suckling mice and chickens by biting and blood-sucking. Their transmission rates to suckling mice were22. 22% for DENI, 37. 50% for DEN2, 25. 00% for DEN3, 44.44% for DEN4 and 37. 50% for JE onthe 10th day after infection, and transmission rates to chickens were 100 % for DEN4 and 66. 67% forJE on the 10th day after infection. These results indicate that Ae. albopictus mosquitoes have the potential to play a role in the maintenance and transmission of DEN and JE viruses in nature.