2014年四川省内江市流行性乙型脑炎监测结果分析

Analysis on Monitoring of Epidemic Encephalitis B in Neijiang in 2014

目的了解四川省内江市流行性乙型脑炎(乙脑)流行规律,为制定乙脑防制策略提供科学依据。方法收集2014年内江市乙脑病例、媒介监测、健康人群及宿主监测资料,用Excel2003进行分析。结果 2014年内江市共监测乙脑疑似病例15例,确诊5例,发病率为0.13/10万;发病呈明显季节性,7-8月为流行季节;病例主要为10岁以下儿童。三带喙库蚊占56.97%,为优势蚊种,其密度高峰在8月。健康人群抗体阳性率为47.51%,宿主动物感染率为9.17%。结论内江市乙脑呈低水平散发态势,但全市仍存在乙脑的流行因素。三带喙库蚊为内江市优势蚊种,其密度高峰与乙脑发病基本一致。应提高适龄儿童乙脑疫苗接种率、保持高抗体水平,以有效控制乙脑的流行。

Objective To analyze the prevalent trend of encephalitis B in Neijiang in 2014, and provide a scientific evidence for influenza prevention and control. Methods Monitoring data of encephalitis B cases, media monitoring, healthy people and host in Neijiang in 2014 were collected and analyzed with Excel 2003. Results In total, 15 suspected encephalitis B cases were reported and 5 cases were confirmed with an incidence of 0. 13/105. The peak seasons of encephalitis B was from July to August, most cases were under the age of 10 years. Culex tritaeniorhynchus took a proportion of 56. 97% and was the advantage mosquitoes. The peak density was August. The healthy people antibody positive rate was 47.51%. The host animal rate was 9.17%. Conclusion Encephalitis B in Neijiang is currently at low level distribution, epidemic factors to encephalitis B exist in the city. Culex tritaeniorhynchus is advantage mosquitoes and consistent with peak sea- sons and the seasonal distribution of encephalitis B. High coverage of vaccination and antibody level can effectively control the epidemic encephalitis B.