Volume 25, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Sentinel pigs were bled and mosquitoes were collected for isolation of Japanese encephalitis virus (JEV) between 1969 and 1973 in a rural area of northern Taiwan which reported a high annual incidence of human cases. The study site included a farmyard, schools, a bat cave, rice paddies and a heronry. Although was collected in every month of the year, isolations were made only in midsummer and only from and (once) from . These isolates were usually collected from pig-related sources. Human cases in the vicinity of the study site were reported 3 to 6 weeks following the initial isolations from sentinel pigs. Isolations were made only for 4 to 8 weeks each summer. The isolation of JEV was not related to the availability of susceptible pigs or the spring or summer peaks in prevalence of . Despite periodic draining of rice paddies and the application of insecticides, sufficient numbers of were available to support transmission of JEV in each year of the study.


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