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目的:对江苏省2007年正常人群乙脑免疫水平进行监测,为正常人群的乙脑防控提供依据。方法:采用蚀斑减少中和实验,测定正常人群的乙脑抗体水平。结果:2007年共调查1 065人,乙脑抗体阳性率为69.95%,GMT为1∶14.44。阳性率最高的为20～岁组,为93.42%;低滴度抗体≤1∶10占44.98%,0～岁组最高,占85.81%;高滴度抗体≥1∶80占19%,0～岁组最低,占2.58%。3个监测点无锡江阴阳性率为79.24%,GMT为1∶18.93;宿迁宿豫阳性率为75.34%,GMT为1∶19.27;泰州姜堰阳性率为55.14%,GMT为1∶8.15。结论:乙脑低滴度抗体水平主要集中在小年龄组,应加强儿童免疫。3个监测点以苏中免疫水平较低,应加强免疫。
Objective: To monitor the level of Japanese Encephalitis B (JE) immunization in Jiangsu Province in 2007 and provide evidence for prevention and control of JE in the general population. Methods: Using plaque reduction and neutralization test to determine the level of JE antibody in normal population. Results: A total of 1 065 people were investigated in 2007. The positive rate of JE antibody was 69.95% and the GMT was 1:14.44. The highest positive rate was 20.4% in 20 ~ group, low titer antibody ≤1:10 accounted for 44.98%, highest in 0 ~ group, accounting for 85.81%, high titer antibody≥1:80 accounted for 19%, 0 ~ The lowest in the group, accounting for 2.58%. The positive rate of Wuxi Jiangyin was 79.24%, the GMT was 1:18.93, the positive rate of Suqian Suyu was 75.34% and the GMT was 1:19.27. The positive rate of Jiangyan in Taizhou was 55.14% and the GMT was 1: 8.15. Conclusion: The low antibody titer of Japanese encephalitis is mainly concentrated in the younger age group, and should be strengthened in children. Three monitoring points to the lower level of immunity in the Soviet Union, should strengthen the immune.