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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 understand the epidemic pattern of Japanese encephalitis (JE) in Neijiang City, Sichuan Province, and to provide a scientific basis for developing JE control strategy. Methods The cases of JE in Neijiang City in 2014, media monitoring, healthy population and host monitoring data were collected and analyzed by Excel2003. Results In 2014, a total of 15 suspected cases of JE were detected in Neijiang City. Five cases were confirmed with a prevalence of 0.13 per 100 000. The disease was obviously seasonal and the epidemic season was from July to August. The cases were mainly children under 10 years of age. Three Culex tritaeniorhynchus accounted for 56.97%, the dominant mosquito species, the density peak in August. The positive rate of antibody in healthy population was 47.51%, and that of host animal was 9.17%. Conclusion Neijiang City, J encephalitis showed a low level of distribution, but there are still epidemic factors in JE. Three Culex tritaeniorhynchus dominant mosquito species in Neijiang City, the density peak and the incidence of Japanese encephalitis basically the same. JE vaccine levels should be increased for school-age children and maintain high antibody levels so as to effectively control the epidemic of JE.