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乙脑的传播媒介主要是蚊虫,其次还有其它节枝昆虫类,甚至两栖动物、爬行动物、蝙蝠等都可携带病毒传播。据研究证明目前传播乙脑的有库蚊、伊蚊和按蚊3个属的11种蚊子感染乙脑病毒后可终生带毒并可经卵传递和随蚊虫越冬,故也可称为长期宿主。根据有以下几点:①三带喙库蚊在7月上句出现,指数高,带毒率高。②当三带喙库蚊指数高,带毒率增高时则猪血内的抑抗体出现早。③猪棚内的蚊种90％以上是三带喙库蚊,④给猪进行乙脑病毒疫苗接种后,三带喙库蚊的带毒率和人
JE’s vectors are mainly mosquitoes, followed by other branches and insects, and even amphibians, reptiles, bats and the like can carry the virus. According to the research, 11 mosquitoes of Culex pipiens, Aedes mosquitoes and Anopheles mosquitoes that are currently transmitting JE are infected with JE for a lifetime and can be transmitted by egg and wintering with mosquitoes, so they can also be called as long-term hosts . According to the following points: ① Culex tritaeniorhynchus in July appeared on the sentence, the index is high, with a high rate of poisoning. ② When the index of Culex tritaeniorhynchus is high, when the rate increases, the antibody in pig blood appears earlier. ③ More than 90% of the mosquito species in the pig shed were Culex tritaeniorhynchus; ④ After the vaccination of pigs with JE virus, the virulence rate and population of Culex tritaeniorhynchus