大连市1951～2002年流行性乙型脑炎趋势分析

目的　分析大连市 195 1～ 2 0 0 2年流行性乙型脑炎 (乙脑 )发病特征及流行趋势 ,掌握其流行规律 ,制定防制对策。方法　流行病学和统计学。结果　 195 1～ 2 0 0 2年全市共发生乙脑 790 2例 ,年平均发病率 3 .49/10万 ,先后出现 5次流行高峰 ;疫情呈散在分布且相对集中的特点 ,庄河、普兰店、瓦房店发病率最高 ,占全市总病例数的 68.43 %;8、9月份发病最多 ,占病例总数的 94.0 1%;乙脑主要传播媒介为三带喙库蚊 ,大连市以淡色库蚊为优势种。结论　接种乙脑灭活疫苗 ,清除蚊虫孳生地 ,可有效控制乙脑的发生和流行

Analysis on the Epidemic Trends of Epidemic Encephalitis B in Dalian,1951-2002

Objective To analyze the case feature and epidemic tendency of Epidemic Encephalitis B(EEB) in Dalian during 1951- 2002 for understanding the epidemic regularity and formulating a countermeasure to control it. Methods Epidemiology and statistics. Results There had been 7 902 patients with EEB and 5 prevalent peaks in whole city during 1951- 2002. The annual average incidence rate was 3.49/10 5 . The cases had characteristic of disperse and focus. There were the major areas of patients in Zhuanghe, Pulandian and Wafangdian, according for 68.43% of total cases. There were greatest numbers of cases in August, September, according for 94.01% of total cases. The chief vehicle of disseminate of EEB was Culex tritaeniorhynchus . Culex pipiens pallens was dominant mosquito in Dalian recently years. Conclusion By inoculating the inactived vaccine and clearing the heavy infestation of mosquitoes, the spread of disease can be controlled effectively.