Spatiotemporal patterns of Japanese Encephalitis in China, 2002–2010

Wang, Li-Ya, Zhang, Wen-Yi, Ding, Fan, Hu, Wenbiao, Soares Magalhaes, Ricardo J., Sun, Hai-Long, Li, Yi-Xing, Zou, Wen, Wang, Yong, Liu, Qi-Yong, Li, Shen-Long, Yin, Wen-Wu, Huang, Liu-Yu, Clements, Archie C.A., Bi, Peng, & Li, Cheng-Yi (2013) Spatiotemporal patterns of Japanese Encephalitis in China, 2002–2010. PLoS Neglected Tropical Diseases, 7(6), e2285.

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The aim of the study is to examine the spatiotemporal pattern of Japanese Encephalitis (JE) in mainland China during 2002-2010. Specific objectives of the study were to quantify the temporal variation in incidence of JE cases, to determine if clustering of JE cases exists, to detect high risk spatiotemporal clusters of JE cases and to provide evidence-based preventive suggestions to relevant stakeholders.


Monthly JE cases at the county level in mainland China during 2002-2010 were obtained from the China Information System for Diseases Control and Prevention (CISDCP). For the purpose of the analysis, JE case counts for nine years were aggregated into four temporal periods (2002; 2003-2005; 2006; and 2007-2010). Local Indicators of Spatial Association and spatial scan statistics were performed to detect and evaluate local high risk space-time clusters.


JE incidence showed a decreasing trend from 2002 to 2005 but peaked in 2006, then fluctuated over the study period. Spatial cluster analysis detected high value clusters, mainly located in Southwestern China. Similarly, we identified a primary spatiotemporal cluster of JE in Southwestern China between July and August, with the geographical range of JE transmission increasing over the past years.


JE in China is geographically clustered and its spatial extent dynamically changed during the last nine years in mainland China. This indicates that risk factors for JE infection are likely to be spatially heterogeneous. The results may assist national and local health authorities in the development/refinement of a better preventive strategy and increase the effectiveness of public health interventions against JE transmission.

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ID Code: 67156
Item Type: Journal Article
Refereed: Yes
DOI: 10.1371/journal.pntd.0002285
ISSN: 1935-2735
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > PUBLIC HEALTH AND HEALTH SERVICES (111700) > Epidemiology (111706)
Divisions: Current > Institutes > Institute of Health and Biomedical Innovation
Deposited On: 12 Feb 2014 05:36
Last Modified: 12 Feb 2014 22:32

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