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| An analysis on epidemiological characteristics of Japanese encephalitis in Zhejiang Province |
| DENG Xuan，YAN Rui，TANG Xue-wen，ZHOU Yang，YAN Ju-ying，HE Han-qing，FU Jian
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| Zhejiang Provincial Center for Disease Control and Prevention，Hangzhou，Zhejiang，310051，China |
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Abstract Objective To analyze the epidemiological characteristics of Japanese encephalitis（JE）in Zhejiang Province from 2007 to 2016 for developing the measures of control and prevention. Methods The data were collected from national notifiable diseases registry system（NNDRS）and case-based JE surveillance system（JESS） from 2007 to 2016，and they were analyzed through descriptive epidemiological method and Microsoft Office Excel 2010. Results From 2007 to 2016，a total of 595 JE cases were reported in Zhejiang Province，with an average annual incidence of 0.114 per 100 000 population，among which，559（93.95%）were laboratory confirmed. During the ten years，20 cases died and the average annual case fatality rate was 3.36%. Cases were distributed mainly in Wenzhou，Ningbo and Taizhou Cities，which accounting for 54.79% of the total.The peak months were July，accounting for 86.89% of all the cases.And 85.71% of all the cases were in the age of 0-14 years and 47.73% were scattered children.And 22.77% of the JE cases were vaccinated but 14.01% of them did not complete the whole course.And 77.23% of the cases did not have the experience of vaccination or unknown. Conclusion The incidence of JE is decreasing. The occurrence of JE is sporadic with distinct seasonal peak and mainly concentrating in young-age children.
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Received: 18 April 2017
Revised: 13 June 2017
Published: 10 October 2017
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