Surveillance for Japanese encephalitis in villages near Madurai, Tamil Nadu, India.
A simple dusk index was developed to monitor the density of recognized vectors of Japanese encephalitis virus (JEV) based on hand catches around cattlesheds at dusk and parous rates. When used routinely in combination with sentinel animal studies for surveillance in villages with a high prevalence (46.2%) of neutralizing antibodies against JEV in children under 16 years, there was a peak in vector density and virus activity during the north-east monsoon period, October-December. The reasons for an unusual outbreak of cases of encephalitis during the summer months of 1984 are discussed.
Mani
T R
TR
Centre for Research in Medical Entomology, Satya Sai Nagar, Madurai, India.
Rao
C V
CV
Rajendran
R
R
Devaputra
M
M
Prasanna
Y
Y
Hanumaiah
Gajanana
A
A
Reuben
R
R
D000818:Animals; D003465:Culex / Q000382:microbiology; D004664:Encephalitis Virus, Japanese / Q000302:isolation & purification*; D004672:Encephalitis, Japanese / Q000453:epidemiology* / Q000382:microbiology; D006801:Humans; D007194:India / Q000453:epidemiology; D007303:Insect Vectors / Q000382:microbiology; D011156:Population Density; D011159:Population Surveillance; D016036:Seroepidemiologic Studies; D013997:Time Factors