Characteristics of epidemic situation of dengue fever in Shenzhen city, 2014-2018
CHEN Zhi-gao1, SUN Meng-ting2, LI Yuan1, MEI Shu-jiang1, LIAO Yu-xue1, CHENG Cong1
1.Infectious Disease Prevention and Control Institute, Shenzhen Municipal Center for Disease Control and Prevention, Shenzhen, Guangdong 518055, China; 2.School of Public Health, University of South China, Hengyang, Hunan 421001, China
Abstract：Objective To analyze the characteristics of epidemic situation of dengue fever in Shenzhen city from 2014 to 2018, to evaluate its prevention and control effectiveness so as to provide a basis for formulating prevention and control strategies. Methods We collected the information about dengue fever cases reported in Shenzhen city during 2014-2018 as well asthe case informationreported by China Disease Prevention and Control Information System. The epidemic data were collated and analyzed by Office 2010 and SPSS 11.5 software. Results A total of 825 dengue fever cases were cumulatively reported in Shenzhen from 2014 to 2018, and the incidence rates were between 0.26/100,000 and 4.21/100,000. There were 499 local cases, including 312 local male cases (with the average annual incidence rate of 0.97/100,000) and 187 local female cases (with the average annual incidence rate of 0.70/100,000), and no statistically significant difference was found in the incidence rate between males and females (χ2=12.23, P<0.001). There were 326 imported cases, including 199 male cases (with the average annual incidence rate of 0.61/100,000) and 127 female cases (with the average annual incidence rate of 0.48/100,000), and no statistically significant difference was found in the incidence rate between males and females (χ2=5.24, P<0.05). The peak incidence period was from September to November (with a total of 688 cases, accounting for 83.39%). The epidemics in 2014 and 2018 spread widely (the street coverage proportions were 68.66% and 37.31%, respectively). Workers (n=252), homemakers and the unemployed (n=197) and commercial services (n=142) were the mainstays, accounting for 71.55%. Conclusions Dengue fever epidemics in Shenzhen city in 2014-2018 mainly occurred in September-November, and young adults were the high-risk population. Therefore, it is necessary to strengthen comprehensive vector control measures based on killing adult mosquitoes and eliminating mosquito breeding sites before the high incidence season for the disease and implement anti-mosquito propaganda measures among high-risk population so as to effectively control dengue fever transmission.
2020, Vol. 27 
