Abstract:

Objective  To evaluate the transmission risk and the prevalence potential of malaria in Cangyuan County after earthquake.  Methods  The malaria epidemiological data were collected through the web-based reporting system and the malaria statistics annual reporting system from 2005 to April 2015, and the epidemic factors of malaria after earthquake in the recent three years in Cangyuan County of Yunnan Province were analyzed.  Results  According to the web-based reporting system, 799 malaria cases were reported in Cangyuan County from 2005 to April 2015, of which 652 were vivax malaria, 127 falciparum malaria, and 20 unclassified. The highest number of cases occurred in 2006 (n=326), and one indigenous falciparum malaria case was reported after earchquake. In addition, the cases were mainly distributed in Mangka (n=320, 40.1%), Banlao (n=191, 23.9%), Banhong (n=98, 12.3%) and Mengdong (n=92, 11.5%). According to the annual reporting system, there were a total of 519 indigenous cases (58.4%) and 370 imported cases (41.6%) from 2005 to April 2015. The proportion of indigenous case was above 65% in each year except for 2006, when it was less than 15%. The risk indicator in western townships of Canyuan County was higher, especially in Mangka and Mengjiao.  Conclusions  There is a potential risk of malaria transmission in Cangyuan County of Yunnan province, due to the huge natural, social and biological alterations after earthquake and the yet presence of malaria transmission vehicle.

Key words: Malaria, Transmission risk, Evaluation, Cangyuan County, Earthquake