【摘要】 <正> 流行性乙型脑炎(下称 JE)的传播媒介,在不同时期,不同地区有不同情况。弄清当地 JE 的传播媒介,对预测 JE 流行,采取防治措施,控制和消灭 JE 流行都是极为重要的。近年来日本学者认为,三带喙库蚊吕宋亚种是 JE 的主要传播媒介。更多还原

【Abstract】 Since 1974 an epidemic Japanese encephalitis occurred in the south of Heilongjiang Province,the entomologic studies have been made in the south of this Province for an attempt to isolate virus in 1975 and 1976. We were unable to recover Japanese encephalitis virus(JEV)from mos- quitoes at that time. A total 2774 mosquitoes belonging to three genera,six species were collected in Wuchang County of Heilongjiang for an attempt to isolate the virus at the time between June and September 1977.Anopheles Sinesis and Ae Vexans was respectively represented 62.5% and 31.2% of all the female mosquitoes collected during this period.Only one strain of JEV was isolated from Ae Vexans pools,while no isolation of JEV was obtained from other species. Ae Vexans liked to feed upon porcine blood,and can be infected with JEV when fed upon viremic hosts.After appropriate incubation period, they transmit the virus to other susceptible hosts. The recovery of JEV from these mosquitoes in Wuchoang County,the demonstration of their population in the ascendancy at the time of human and animal JEV infections and this species fed upon both groups of hosts during that priod,together constituted convincing evidence that they were the vectors involved in epidemic of Japanese encephalitis in 1974.Ae Ve- xans plays a major role in the transmission of JEV in Heilongjiang Provincc.更多还原