During 2016-2018, we conducted surveillance for Japanese encephalitis virus (JEV) in mosquitoes and pigs in Japan, Thailand, the Philippines, and Indonesia. Phylogenetic analyses demonstrated that our isolates (genotypes Ia, Ib, III, IV) were related to JEV isolates obtained from the same regions many years ago. Indigenous JEV strains persist in Asia.
Keywords: Culex tritaeniorhynchus; GIII; GIV; Indonesia; Japan; Japanese encephalitis virus; Southeast Asia; Thailand; arbovirus; arthropodborne virus; epidemiology; meningitis/encephalitis; mosquitoborne disease; pig; surveillance; the Philippines; vector-borne infections; viruses; wild boar; zoonoses.