云南白纹伊蚊感染、传播登革和乙型脑炎病毒的研究

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

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。

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.