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目的 本文对云南省大理州 12个县 (市 ) 1992～ 2 0 0 1年流行性乙型脑炎 (简称乙脑 )的流行现状进行了分析。方法 乙脑病例和疫苗接种率资料从大理州疾病预防控制中心收集 ,气象和稻田种植面积资料分别从大理州气象局和大理州土地局获得。统计学分析用STADA 6. 0软件进行。结果 在这 10年间 ,大理州共报道 83 9例乙脑病例 ,其中死亡 10 1例 ,发病率为 0 . 91/10万～ 6. 45 / 10万 ,死亡率为 0 . 0 9/ 10万～ 0 . 5 2 / 10万 ,病死率为 7. 92 %～ 16. 47%。每年乙脑病例从 4月出现 ,12月止 ,主要流行季节 8至 10月 (占病例数的 90 . 46% ) ,9月为流行高峰 (占病例数的 41. 72 % )。大理州 12县 (市 )都有乙脑病例分布 ,各县市发病率由高到低分别为宾川 (7. 3 / 10万 )、祥云 (5 . 2 / 10万 )、漾濞 (5 . 2 / 10万 )、剑川 (4 . 4/ 10万 )、巍山(4 . 2 / 10万 )、洱源 (2 . 8/ 10万 )、大理市 (2 . 7/ 10万 )、弥渡 (2 . 7/ 10万 )、南涧 (2 . 7/ 10万 )、鹤庆 (1. 8/ 10万 )、永平 (1. 6/ 10万 )和云龙 (0 . 7/ 10万 )。从 1997～ 2 0 0 1年所报道的 2 97例乙脑病例分析 ,1997年 5～ 9岁为发病率最高年龄组 ,但是 ,随后几年 ,这种流行模式发生了变化 ,发病率的最高年龄组从 5～ 9岁组逐渐迁移到大于
Objective To analyze the epidemiological status of Japanese encephalitis (JE) from 1992 to 2001 in 12 counties (cities) in Dali Prefecture of Yunnan Province. Methods The data of JE cases and vaccination rates were collected from Dali CDC. The data of meteorology and paddy planting area were obtained from Dali Meteorological Bureau and Dali Prefecture Bureau of Lands respectively. Statistical analysis was performed using STADA 6.0 software. Results During the 10 years, a total of 83 9 JE cases were reported in Dali Prefecture, of which 101 cases were fatal, the incidence rate was 0.91 / 100 ~ 6.45 / 100 000 with a mortality rate of 0.09 / 100 000 ~ 0. 5 2/100 000, mortality was 7. 92% ~ 16. 47%. JE cases occur each year from April to December. The main epidemic season is from August to October (90.46% of cases), and the peak is in September (41. 72% of cases). There are cases of JE distributed in 12 counties (cities) in Dali Prefecture. Binhe (7.3 / 100,000), Xiangyun (5.2 / 100,000) and Yangbi (5. 2/10 million), Jianchuan (4. 4/10 million), Weishan (4.2 / 100,000), Eryuan (2.8 / 100,000), Dali (2.7 / 100,000) Midu (2.7 million), Nanjian (2.7 million), Heqing (1.8 million), Yongping (1.6 million) and Yunlong (0.7 / 100,000). From 1997 to 2001, 2 97 cases of Japanese Encephalitis cases were reported. The highest age group of 5 to 9 years was from 1997 to 2001. However, in the following years, this epidemic pattern had changed with the highest incidence rate The age group gradually migrated to more than 5 to 9 years old group