ICMR-National Institute of Malaria Research, Sector 8, Dwarka, Delhi-110077, India.
J Vector Borne Dis. 2020 Oct-Dec;57(4):301-306. doi: 10.4103/0972-9062.313972.
An outbreak of Japanese encephalitis (JE) was reported in Solan district of Himachal Pradesh, India in May 2018 wherein a total of eight JE cases were reported by the state health department, of which seven cases were confirmed by ELISA. An entomological survey was carried out to investigate the presence of vector mosquitoes in the affected area. Field visits were undertaken in eight villages of two blocks in Solan district. Larval collections were made from the major aquatic sites and emerging mosquito species were identified. Seepage water ditches were the main source of JE vector mosquitoes Culex tritaeniorhynchus and Cx. bitaeniorhynchus. During hand catch collections of adult mosquitoes, three vector species of JE,Culex tritaeniorhynchus (Man Hour Density 1-14), Cx. vishnui (MHD 2) and Cx. bitaeniorhynchus (MHD 1-2) were collected. A few specimens of Cx. tritaeniorhynchus (6 no.) were also collected in light trap collections. Since this was the first reported outbreak of JE from Himachal Pradesh, India, studies on sero-surveillance in addition to bionomics of JE vectors are required for better understanding of epidemiology of JE in Himachal Pradesh. Moreover, there is a need to study the role of climate change especially rising temperature in the context of JE in Himachal Pradesh.
2018 年 5 月，印度喜马偕尔邦索兰地区报告了一起日本脑炎（JE）疫情，州卫生部门共报告了 8 例 JE 病例，其中 7 例通过 ELISA 确诊。进行了一项昆虫学调查，以调查受影响地区是否存在病媒蚊。在索兰区的两个街区的 8 个村庄进行了实地考察。从主要的水生地点采集了幼虫，并确定了新出现的蚊子种类。渗水井是 JE 病媒蚊三带喙库蚊和致倦库蚊的主要来源。在成蚊的人工捕获中，收集到了三种 JE 病媒蚊，三带喙库蚊（人均密度 1-14）、Cx. vishnui（MHD 2）和致倦库蚊（MHD 1-2）。在灯光诱捕中也收集到了一些三带喙库蚊（6 只）的标本。由于这是印度喜马偕尔邦首次报告 JE 疫情，因此除了对 JE 病媒蚊的生物学特性进行研究外，还需要进行血清学监测研究，以更好地了解喜马偕尔邦 JE 的流行病学情况。此外，需要研究气候变化，特别是气温升高在喜马偕尔邦 JE 中的作用。
