Epidemiological characteristics of Japanese encephalitis in eight provinces and municipalities of northern China, 2005-2019

WANG Zhi-hui, LI Wen, GUO Yu-hong, YUE Yu-juan, WANG Jun, MA Xin-ran, XU Ming-fang, WU Hai-xia, LIU Qi-yong, MENG Feng-xia

doi:10.11853/j.issn.1003.8280.2021.02.015

Chinese Journal of Vector Biology and Control >

2021 , Vol. 32 >Issue 2: 197 - 203

DOI: https://doi.org/10.11853/j.issn.1003.8280.2021.02.015

Vector Infectious Disease

Epidemiological characteristics of Japanese encephalitis in eight provinces and municipalities of northern China, 2005-2019

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1. State Key Laboratory of Infectious Disease Prevention and Control, Department of Vector Biology and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Vector Surveillance and Management, Beijing 102206, China;
2. College of Life Science, Northeast Agricultural University, Harbin, Heilongjiang 150036, China;
3. School of Public Health, Shandong First Medical University, Tai'an, Shandong 271016, China

Received date: 2020-10-29

Online published: 2021-04-20

Supported by

Supported by the National Science and Technology Major Project of China(2018ZX10101002-002)

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Abstract

Objective To analyze the epidemiological characteristics of Japanese encephalitis (JE) in eight provinces and municipalities of northern China (Gansu, Ningxia Hui Autonomous Region, Shaanxi, Shanxi, Hebei, Beijing, Tianjin, and Liaoning) from 2005 to 2019, to investigate the pattern of the development of JE, and to provide a scientific basis for effective prevention and control of JE. Methods A descriptive epidemiological analysis was performed for JE cases in the above eight northern provinces and municipalities from 2005 to 2019, which were collected through the China Information System for Disease Control and Prevention and JE Surveillance Information Reporting and Management System. Results From 2005 to 2019, the mean annual incidence rate of JE was 0.14/100 000 and there were 390 deaths, with a case fatality rate of 7.25%. The distribution of JE expanded from 157 counties/districts in 2005 to 254 counties/districts in 2018. The number of cases from August to September accounted for 81.26% of all cases, and August and September were the peak periods for the onset of JE. The proportion of patients aged 0-14 years decreased from 54.55% in 2005 to 3.96% in 2019, and the proportion of patients aged ≥ 15 years increased from 45.18% in 2005 to 96.03% in 2019 (χ²_trend=998.524, P<0.001). Farmers, preschool and scattered children, and students accounted for 58.76%, 14.81%, and 12.38%, respectively. The proportion of farmers increased from 37.19% in 2005 to 79.21% in 2019. Conclusion The distribution of JE has expanded in the eight provinces and municipalities of northern China, and age distribution tilts toward high age. As for occupational composition, there is an increase in the proportion of farmers.

Key words： Japanese encephalitis; Epidemiological characteristics; Prevention and control

Cite this article

WANG Zhi-hui, LI Wen, GUO Yu-hong, YUE Yu-juan, WANG Jun, MA Xin-ran, XU Ming-fang, WU Hai-xia, LIU Qi-yong, MENG Feng-xia . Epidemiological characteristics of Japanese encephalitis in eight provinces and municipalities of northern China, 2005-2019[J]. Chinese Journal of Vector Biology and Control, 2021 , 32(2) : 197 -203 . DOI: 10.11853/j.issn.1003.8280.2021.02.015

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