The
relationship of infection rate of Japanese encephalitis in mosquito vectors
to the incidence of encephalitis in Thailand from 1992 to 1994
Supon Paosriwong*
Apiwat Tawatsin*
Usavadee Thavara*
Chitti Chansang*
Prakong Phan-Urai*
Affiliations :
*National Institute of Health, Department
of Medical Sciences
Source:
Journal of Health Science 1998; 7(2):
241-246
Language:
Thai with English abstract
Abstract:
The occurrence of Encephalitis is related
to several factors. The infection rate in vector mosquitoes which are Culex
tritaeniorhynchus, Culex gelidus, and Culex fuscocephala,
may be one variable to predict the epidemiological trend of Encephalitis.
The objective of this study was to determine whether there was the relationship
between JE virus infection rate in mosquitoes and the incidence of Encephalitis
cases in 6 provinces of Thailand: Uttaradit, Chiangrai, Chumphon, Suratthani,
Khonkaen and Ayutthaya. Mosquito samples were collected every month for
three years (1992-1994). The JE virus antigen was detected by ELISA technique.
In Uttaradit, Chiangrai, Suratthani, Khonkaen and Ayutthaya, direct relations
were reported with correlation coefficients (r) of 0.32, 0.07, 0.15, 0.11,
and 0.42 respectively, whereas in Chumphon there was an inverse correlation
with a correlation coefficient (r) of -0.04.