Spatiotemporal analysis of indigenous and imported dengue fever cases in Guangdong province, China

Li, Zhongjie, Yin, Wenwu, Clements, Archie, Williams, Gail, Lai, Shengjie, Zhou, Hang, Zhao, Dan, Guo, Yansha, Zhang, Yonghui, Wang, Jinfeng, Hu, Wenbiao and Yang, Weizhong (2012) Spatiotemporal analysis of indigenous and imported dengue fever cases in Guangdong province, China. BMC Infectious Diseases, 12 132.1-132.9. doi:10.1186/1471-2334-12-132


Author Li, Zhongjie
Yin, Wenwu
Clements, Archie
Williams, Gail
Lai, Shengjie
Zhou, Hang
Zhao, Dan
Guo, Yansha
Zhang, Yonghui
Wang, Jinfeng
Hu, Wenbiao
Yang, Weizhong
Title Spatiotemporal analysis of indigenous and imported dengue fever cases in Guangdong province, China
Journal name BMC Infectious Diseases   Check publisher's open access policy
ISSN 1471-2334
Publication date 2012-06-01
Sub-type Article (original research)
DOI 10.1186/1471-2334-12-132
Open Access Status DOI
Volume 12
Start page 132.1
End page 132.9
Total pages 9
Place of publication London, United Kingdom
Publisher BioMed Central
Language eng
Formatted abstract
Background: Dengue fever has been a major public health concern in China since it re-emerged in Guangdong province in 1978. This study aimed to explore spatiotemporal characteristics of dengue fever cases for both indigenous and imported cases during recent years in Guangdong province, so as to identify high-risk areas of the province and thereby help plan resource allocation for dengue interventions.
Methods: Notifiable cases of dengue fever were collected from all 123 counties of Guangdong province from 2005 to 2010. Descriptive temporal and spatial analysis were conducted, including plotting of seasonal distribution of cases, and creating choropleth maps of cumulative incidence by county. The space-time scan statistic was used to determine space-time clusters of dengue fever cases at the county level, and a geographical information system was used to visualize the location of the clusters. Analysis were stratified by imported and indigenous origin.
Results: 1658 dengue fever cases were recorded in Guangdong province during the study period, including 94 imported cases and 1564 indigenous cases. Both imported and indigenous cases occurred more frequently in autumn. The areas affected by the indigenous and imported cases presented a geographically expanding trend over the study period. The results showed that the most likely cluster of imported cases (relative risk = 7.52, p < 0.001) and indigenous cases (relative risk = 153.56, p < 0.001) occurred in the Pearl River Delta Area; while a secondary cluster of indigenous cases occurred in one district of the Chao Shan Area (relative risk = 471.25, p < 0.001).
Conclusions: This study demonstrated that the geographic range of imported and indigenous dengue fever cases has expanded over recent years, and cases were significantly clustered in two heavily urbanised areas of Guangdong province. This provides the foundation for further investigation of risk factors and interventions in these high-risk areas.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article # 132

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
School of Public Health Publications
 
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Created: Thu, 13 Dec 2012, 00:40:36 EST by Geraldine Fitzgerald on behalf of School of Public Health