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

: ［摘要］目的 分析2012–2014年云南省边境地区20个县输入性疟疾疫情特征, 为云南省消除疟疾策略的调整提供依 据。方法 收集2012–2014年云南省边境地区20个县的疟疾疫情资料, 采用Microsoft Excel 2010软件对数据进行整理 分析。结果 2012–2014年云南省边境地区20个县共报告疟疾病例1 558例, 其中输入性疟疾病例占85.75% (1 336/ 1 558), 本地感染病例占14.25% (222/1 558) 。2012、2013年和2014年输入病例分别占当年报告病例总数的80.00% (544/ 680) 、89.10% (425/477) 和91.52% (367/401) 。报告的1 336例输入性疟疾病例以间日疟为主, 共1 045例, 占78.22%; 恶性 疟284例, 占21.26%; 三日疟3例、混合感染3例、未分型1例; 报告死亡病例2例。感染来源地以缅甸为主 (1 277例), 占 输入性病例总数的95.58%。发病人群主要为出国务工的20～40岁男性青壮年 (802例, 占60.03%), 以4–6月发病最多 (679例, 占50.82%) 。输入性病例主要分布在腾冲 (459例) 、瑞丽 (366例) 、盈江 (191例) 和芒市 (78例) 。结论 云南省 边境地区输入性疟疾疫情较为严重, 因此, 在消除疟疾及消除后阶段, 需建立并维持良好的监测体系, 确保能及时快速地 对输入性疟疾疫情进行响应。. 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 Plasmodium vivax, 284 (21.26%) were infected with P. falciparum, 3 were infected with P. malariae, 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.