Volume 19, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



This study was designed to investigate 1) the role of Black-crowned Night Herons (BCNH) in the dissemination of Japanese encephalitis virus, 2) to investigate the mosquito vectors that participate in the annual epidemic, and 3) to determine the chronology of infection in Herons, mosquitoes, and man in the area of a heronry in Taiwan during 1967 and 1968. Nestling BCNH and sentinel pigs were serially bled to determine the time of development of antibody. Mosquitoes were collected from light traps, pig-baited and birdbaited Magoon traps, and by hand from pigs. Cases in man were serologically confirmed. Although the arrival of the Herons and the prevalence of mosquitoes paralleled previous years, the epidemic was 2 months later than usual. Infection was found first in pigs in late July, then in man and Herons, and last in mosquitoes in mid-August. (Theobald) was the most prevalent mosquito and the source of three of the five pools yielding virus. The results suggest that (Theobald) is the principal mosquito vector of Japanese encephalitis virus, and that BCNH did not bring the virus to Taiwan. However, the sequence of infection suggests that mosquitoes thus far implicated were not the initial vector. Thus this study raises the question of undetermined insect and animal vectors in the dissemination of JE virus.


Article metrics loading...

The graphs shown below represent data from March 2017
Loading full text...

Full text loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error