Objective To investigate the immune level of Japanese encephalitis （JE） in the healthy population of Jiangsu Province. Method Plaque reduction neutralization test was performed to detect antibody levels to Japanese encephalitis virus in 3,258 sera samples collected from subjects aged between 0 and 20 years from 2006 to 2009. Result The total positive rate of antibody levels to Japanese encephalitis virus was 70.35%,and GMT was 1：13.56. Conclusions The JE antibody can exert a protective effect on persons over 3-year-old in Jiangsu Province,the JE antibody positive rate and titer become higher along with the age growing,but 0-and 1-year-old children have the lower JE antibody level which should be strengthen.
Practical Preventive Medicine
Plaque reduction neutralization test