Objective To understand the level of Japanese encephalitis antibody among healthy people in Hebei Province. Methods Cross - sectional study and cluster sampling method were used in the study. Healthy individuals selected from four cities d Hebei Province were divided into six age- groups （each n = 20）, then their sera specimens were collected. The indirect ELISA method was used to detect IgG antibodies against Japanese encephalitis virus. Results The positive rate of antibody level to Japanese encephalitis virus in healthy population of Hebei Province was 40.63 %. No statistically significant difference was found in the positive rate of antibody level to Japanese encephalitis virus among different age- groups, but there were statistically significant differences in the pcxsitive rates among different regions. Conclusions The positive rate of antibody level to Japa- nese encephalitis virus in healthy population of Hebei Province is lower, and hence, more attention should be paid to Japanese en- cephalitis epidemics, especially in some regions. It is essential to enhance the vaccine immunization work and improve the vaccina- tion rate and inoculation quality so as to raise the population immunization level.
Practical Preventive Medicine