Epidemiology of dengue fever in Fujian, China, 2014

Objective To understand the epidemiologic characteristics of dengue fever and related risk factors in Fujian province 2014. Methods The incidence data of dengue fever cases and outbreaks in Fujian in 2014 were collected fromNational Disease Reporting Information System for descriptive epdemiologic analysis. Results A total of 297 cases of dengue fever, including 50 imported cases and 247 local cases, were reported from 7 out of 9 prefectures in Fujian, and 83.8% (249/297) of reported cases were from Putian and Nanping, and 27.3%(24/88) of the counties in Fujian were involved, however,73.7%(212/297) of reported cases were reported from 2 counties. The peak of reporting cases was during September-October (accounting for 88.9% of all cases). The local infected cases were reported only in August, September, October and November, while imported cases were found all the year round. Cases were reported in all age groups, but the cases in age group 25-65 year group accounted for highest proportion. It was found that the imported cases were from 10 countries of Southeast Asia, Africa and South America, and most of the imported cases were from Southeast Asia. The domestic imported cases were mainly from Guangdong province. The median of interval between onset of illness and diagnosis was 4.7 days, and 57.6% (171/297) of cases were found within 5 days after onset of illness. Conclusion Although the local cases of dengue fever accounted for high proportion in Fujian, it is still necessary to strengthen the surveillance for imported dengue fever cases for the early detection and timely response.