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登革热是由登革热病毒引起,通过伊蚊传播的急性传染病,多见于热带和亚热带地区。由于登革热病毒在蚊虫种群中能够长期经卵传递,并且可以在蚊虫滞育卵中越冬存活,使得亚热带地区登革热病毒长期存在成为可能。我国亚热带地区登革热病例的来源既有输入性的,也不排除本地性的。而人群登革热病毒抗体水平的周期性变化、媒介蚊虫体内登革热病毒的数量变化以及登革热病毒自身不断发生的变异则可能是导致登革热在某地区反复间歇性暴发流行的原因。
Dengue is an acute infectious disease caused by dengue virus and transmitted by Aedes mosquitoes. It is more common in the tropical and subtropical regions. Due to the long-term transmission of the dengue virus in the mosquito population and overwintering in diapause eggs of mosquitoes, the long-term presence of the dengue virus in the subtropics is possible. The source of dengue cases in the subtropical areas of our country is both imported and local. The cyclical changes in human dengue virus antibody levels, the quantitative change of dengue virus in vector mosquitoes, and the continuous variability of dengue virus itself may be responsible for the repeated intermittent outbreaks of dengue fever in some areas.