Abstract:

The malaria epidemic data in Baoshan city from 1990 to 2014 were analyzed with concentration ratio and circular distribution. Results showed that the incidence of malaria in Baoshan city displayed a trend of decrease from 1990 to 2014. The total concentration ration M was 0.36, the circular distribution r was 0.30, and the average angle α was 148.78°. The malaria incidence peaked on May 31, with the epidemic period being from March 2 to August 29, which is inconsistent with the seasonal ebb and flow of local malaria vector.