[Objective]To understand the Japanese encephalitis（JE） antibody level among healthy population in Nantong City,analyze the influencing factors,evaluate the immune barrier of JE in population,and provide the basis for developing the prevention and control strategy of JE. [Methods]736 serum specimens collected from two monitoring points of Rugao City and Haian County were detected for the JE antibody by plaque reduction neutralization test. [Results]The total positive rate of JE antibody was 71.60%,and GMT was 1 ∶16.78. The l positive rate of JE antibody in Rugao City was higher than that in Haian County（χ2=11.54,P〈0.01）,and the antibody level in two areas increased with increasing age.The multiple logistic regression analysis showed that positive rate was related to immunization history,subclinical infection and sex.[Conclusion]The JE antibody can exert a protective effect on persons over 2 years old in Nantong City. However,JE antibody level among children below 1 year old is low,and it is necessary to strengthen the protection in this population.
Occupation and Health