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为了解四川省流行性乙型脑炎 (乙脑 )疫情动态和流行趋势 ,为乙脑防制工作提供科学依据 ,在全省选择 5个监测点 ,从 2 0 0 2年开始进行乙脑的常规监测 ,血清学检测采用反向被动血凝抑制试验 (RPHI)。结果显示 :2 0 0 2年全省乙脑疫情平稳 ,高峰期在 8月 ,健康儿童乙脑抗体阳性率为 6 1 17% ,各监测点之间乙脑抗体阳性率差异有显著的统计学意义 (χ2 =11 6 1,P <0 0 5 ) ;乙脑抗体阳性率 <6岁儿童偏低 (2 6 4 7% ) ,并随年龄的增长而增高 ,各年龄组之间抗体阳性率差异有非常显著的统计学意义 (χ2 =2 3 6 7,P <0 0 1)。猪抗体阳性率高峰在 7月 ,6～ 7月各旬之间抗体阳性率差异有非常显著的统计学意义 (χ2 =2 72 0 0 ,P <0 0 1)。临床病例血清学确诊率为5 6 6 3% ,<6岁儿童占 74 70 %。表明加强儿童乙脑疫苗预防接种和提高免疫覆盖率仍是防制乙脑的关键。
To understand the epidemiological and epidemic trend of Japanese encephalitis (JE) in Sichuan Province and provide a scientific basis for the prevention and control of Japanese encephalitis, five monitoring sites were selected in the province and JE was started from 2002 Routine monitoring, serological test using reverse passive hemagglutination inhibition test (RPHI). The results showed that the epidemic situation of Japanese encephalitis in the whole province was stable in 2002, the peak was in August, the positive rate of Japanese encephalitis was 61.17% in healthy children, and there was a significant difference in the positive rate of Japanese encephalitis among all the monitoring points (Χ2 = 11 6 1, P <0 05). The positive rate of JE antibody in children <6 years old was low (26.47%) and increased with age, the positive rate of antibody in each age group The difference was statistically significant (χ2 = 2367, P <0.01). The positive rate of pig antibody in July, June to July ten days between the antibody positive rate difference was statistically significant (χ2 = 2 7200, P <0.01). Serological diagnosis of clinical cases was 5636%, 74% of children <6 years old. This shows that strengthening vaccination and increasing immunization coverage of children with JE vaccine are still the key to preventing JE.