20 14 epidemic sources of dengue fever in Guangzhou

Dengue fever is an acute viral disease caused by dengue virus, which is mainly spread among people through mosquito bites. The disease is mainly prevalent in 100 countries and regions in tropical and subtropical regions, and imported cases are still the main cause of dengue fever in China.

The epidemic situation of dengue fever in China in 20 14 was earlier and more serious than in previous years.

Main reasons:

First, exchanges between China and Southeast Asian countries are becoming more and more frequent. In 20 14, the epidemic situation of dengue fever in some southeast Asian countries increased obviously, which led to the increase of imported cases in China, and it was easy to spread and spread the disease in areas where mosquito vectors were not effectively controlled.

Second, in 20 14, the weather in some southern provinces was hot and there was more rain, which was suitable for the growth of mosquito vectors and the density of mosquito vectors increased obviously;

Thirdly, the infection sources of dengue fever are dengue patients, recessive infected people, non-human primates infected with dengue virus and Aedes mosquitoes carrying the virus, and the infection sources continue to exist in high-incidence areas. Moreover, most patients with dengue fever have mild symptoms, and some patients did not see a doctor in time because of lack of understanding, which further increased the risk of epidemic spread.

Li Dexin, a researcher at the Institute of Virology of China CDC, said that mosquito activity is closely related to temperature. The vector of dengue fever is Aedes mosquitoes. When the temperature is low, mosquito activity decreases and it is not easy to spread diseases. However, in 20 14, the high temperature, heavy rain and mosquito breeding in southern China led to the outbreak of this major epidemic. The National Health and Family Planning Commission and various departments of the National Center for Disease Control and Prevention are focusing on the prevention and control of dengue fever in Guangdong.