Objective To analyze characteristics and risk factors of dengue fever and provide evidence for followed actions of prevention and control Methods Descriptive statistical methods were used on epidemiological data of dengue fever between 2001 and 2006 to analyze features and related factors of epidemic. Results A total of 2 897 local cases were reported as well as 320 external cases in Guangdong province between 2001 and 2006. The incidence was from 0.01 to 1.77 per 100 thousands annually. Cases were found in 12 dries but clustered in areas of Guangzhou, Shantou, Yangjiang, Zhongshan, et al. and spotted from March to December. Epidemic sustained from June to November and peaked from August to October. The male/female ratio is 1： 1.07. Every age group had reported cases and the majority were in 15 - 54 years group. The incidence grew high in 20 - 44 and 60 - 69 years group. Most cases were household workers, workers waiting for employment, poasants, students, ordinary workers and retired workers. Imported cases from foreign countries were reported each year which were mainly imported from southeast-Asia countries such as Singapore, Indonesia, Cambodia, et al. Primary serotype of dengue virus caused endemic outbreaks was type Ⅰ strain. Conclusion The dengue fever epidemics of Guangdong were closely related to imported cases or importer-induced endemic prevalence and control efforts should focused on Pearl River Delta and east areas of province.
South China JOurnal of Preventive Medicine