[Epidemiological analysis of imported malaria cases in 20 counties at border region of Yunnan Province from 2012 to 2014].

Objective: To analyze the epidemiological characteristics of the imported malaria cases in 20 counties at the border region of Yunnan Province from 2012 to 2014, so as to provide the evidence-based proof for adjusting the strategies in the elimination stage.

Methods: The malaria epidemic data of the 20 border counties in Yunnan Province from 2012 to 2014 were collected and analyzed by using Microsoft Excel 2010.

Results: From 2012 to 2014, a total of 1 558 malaria cases were reported in the 20 border counties in Yunnan Province, among which, 1 336 were imported cases, accounting for 85.75% (1 336/1 558), and 222 were indigenous cases, accounting for 14.25% (222/1 558). The number of the imported cases in the above years took up 80.00% (544/680), 89.10% (425/477) and 91.52% (367/401) of the total reported cases in the whole year, respectively. Among all the 1 336 imported cases, 1 045 (78.22%) were infected with , 284 (21.26%) were infected with , 3 were infected with , 3 were mixed infection and 1 was an unclassified case; 2 patients died. And 95.58% of the cases were mainly infected in Myanmar (1 277 cases). Young and middle-aged adult of 20-40 years who worked overseas were the predominant (802 cases, 60.03%) and most of the cases occurred from April to June of the year (679 cases, 50.82%). Those cases mainly distributed in Tengchong (459 cases), Ruili (366 cases), Yingjiang (191 cases) and Mangshi (78 cases).

Conclusions: The epidemic situation of imported malaria is serious in the border region of Yunnan Province. Therefore, the surveillance system of malaria control needs to be well planned and managed to ensure timely case detection and prompt response at the elimination and post-elimination stage.