Results of mosquito inspection on international aircraft, and incidence of invasion of exotic mosquitoes at quarantine ports and airports in Japan (2008–2018)

Abstract

We report the results of mosquito inspection on international aircra and in government-run areas by the Japanese Quarantine Station, Ministry of Health, Labour and Welfare between 2008 and 2018. In total, 22,452 aircra were inspected and 822 adult mosquitoes (including 145 dead mosquitoes) were collected from 240 (1.07%). e majority of the mosquitoes on aircra belonged to Culex. e most abundant Culex species was Cx. quinquefasciatus and 469 adults were captured. Among them, 398 were collected from aircra from India. e second-most abundant was Cx. pipiens complex (158 adults) and the third was Cx. gelidus (100 adults). An important invasive dengue vector, Aedes aegypti (2 adults), was captured on an aircra from the Philippines. In mosquito inspection at government-run areas, the invasion of Ae. aegypti was con rmed at Narita International Airport in 2012, 2013, 2014, 2015, and 2017, Tokyo International Airport (Haneda Airport) in 2013, and Chubu Centrair International Airport (NGO) in 2016 and 2017. Virus detection from the collected mosquitoes revealed Japanese encephalitis virus gene (genotype I, a prevalent genotype in Japan at present) from Cx. tritaeniorhynchus captured at Narita International Airport in 2013, Mikawa Port in 2015, and Kyushu Saga International Airport in 2017.