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. 2016 Jan;94(1):193-7.
doi: 10.4269/ajtmh.15-0422. Epub 2015 Nov 16.

Severe Dengue Fever Outbreak in Taiwan

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Severe Dengue Fever Outbreak in Taiwan

Sheng-Fan Wang et al. Am J Trop Med Hyg. 2016 Jan.

Abstract

Dengue fever (DF) is a vector-borne disease caused by dengue viruses (DENVs). Epidemic dengue occurs intermittently in Taiwan. In 2014, Taiwan experienced its largest DF outbreak. There were 15,732 DF cases reported. There were a total of 136 dengue hemorrhagic fever (DHF) cases, of which 20 resulted in death. Most DF cases were reported in southern Taiwan. A total of 15,043 (96%) cases were from Kaohsiung, a modern city in southern Taiwan. This report reviews DF epidemics in Taiwan during 2005-2014. The correlation between DF and DHF along with temperature and precipitation were conjointly examined. We conclude that most dengue epidemics in Taiwan resulted from imported DF cases. Results indicate three main factors that may have been associated with this DF outbreak in Kaohsiung: an underground pipeline explosion combined with subsequent rainfall and higher temperature. These factors may have enhanced mosquito breeding activity, facilitating DENV transmission.

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Figures

Figure 1.
Figure 1.
Dengue fever (DF) outbreaks in Taiwan during 2014. (A) Accumulated DF case numbers reported annually in Taiwan during 2005–2014. (B) The geographic map of the DF cases distributed in Taiwan in 2014.
Figure 2.
Figure 2.
Dengue fever (DF) outbreaks in Taiwan. (A) Cumulative imported and indigenous DF cases reported annually in Taiwan during 2005–2013 (left) and cases reported monthly in Kaohsiung City in 2014 (right). The correlation between DF case numbers and the incidence of dengue hemorrhagic fever (DHF) or dengue shock syndrome (DSS) with average temperature and precipitation is illustrated. DHF and DSS reported case numbers and the incidence rate of DHF/DSS in Kaohsiung City and Taiwan were offered by the Department of Health, Kaohsiung City Government, and Taiwan Centers for Disease Control and Prevention. The asterisk indicates the month of pipeline explosion in Kaohsiung City. (B) The correlation between consecutive raining days and number of dengue reported cases in Kaohsiung during 2006–2014 is shown.

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