Epidemiological characteristics of imported malaria in Shanglin county of Guangxi, 2010-2019

Objective To analyze the imported malaria epidemic characteristics in Shanglin county, from 2010 to 2019, we provide reference basis for the formulation of prevention and control strategies. Methods The data of imported malaria were collected in Shanglin County, Guangxi, from 2010 to 2019, and descriptive analysis on the epidemical distribution of imported malaria case survey date, species, source of infection, three-dimensional distribution were conducted. Results A total of 2 319 cases of malaria were reported in Shanglin County, Guangxi, from 2010 to 2019, all of which were imported from abroad, with the largest number of cases detected in 2013 (1 052 cases, 45.4%). It included 1 774 cases (76.5%) with falciparum malaria, 112 cases (4.8%) with vivax malaria, 372 cases (16.0%) with ovale malaria, 26 cases (1.1%) with quartan malaria, and 35 cases(1.5%) with mixed infections. Most malaria cases were young men, and 2 286 cases (98.6%) were male, the ratio of males to females was 69: 1; while 2 205 cases (95.1%) were at ages of 20 to 55 years. Gold mining was the predominant occupation (2 314 cases, 99.8%), the malaria cases were reported in each month across the year, with the largest number of cases detected in June (608 cases, 26.2%), followed by July (405 cases, 17.5%); The cases were distributed in 11 towns, with the largest number of cases detected in Mingliang town (870 cases, 37.5%), followed by Dafeng town (544 cases, 23.5%), and Xiangxian town (496 cases, 21.4%). The malaria cases were originated from 16 countries in Africa (2 293 cases, 98.9%), 3 countries in Southeast Asia (26 cases, 1.1%). The main species were falciparum malaria (1 766 cases, 77.0%) in Africa, and most malaria cases were from Ghana (1 761 cases, 76.8%); the main species were vivax malaria (14 cases, 53.8%) in Southeast Asia, most malaria cases were from Indonesia (53.8%). Conclusions The situation of prevention and control of imported malaria abroad is very serious in Shanglin county, strengthening the surveillance and management of migrant labors is the key to consolidate the achievements of malaria elimination. 摘要:目的 分析广西上林县2010—2019年输人性疟疾的流行病学特征,为制定防控策略提供依据。 方法 收 集广西上林县2010—2019年输人性疟疾疫情数据,对疟疾病例个案流行病学调査资料进行描述性分析。 结果 2010 一2019年上林县共报告疟疾病例2 319例,均为境外输人性病例,2013年病例数最多,为1 052例（占45.4%)。其中恶 性疟1 774例（占76.5%),间日疟112例（占4.8%),卵形疟372例（占16.0%),三日疟26例（占1.1%),混合感染35例（占 1.5%)；病例以青壮年为主,男性为2 286例（占98.6%),男女比例为69:1 ;病例以22~55岁年龄组最多,共2 205例（占 95.1%);职业以淘金为主,共2 314例（占99.8%);病例全年均有报告,其中6月份病例最多,为608例（占26.2%),其次 为7月份,为405例（占17.5%);病例分布于11个乡镇,其中明亮镇最多,为870例（占37.5%),其次为大丰镇544例（占 23.5%)巷贤镇496例（占21.4%);感染来自非洲16个国家和东南亚3个国家,来自非洲感染共2 293例（占98.9%)虫 种以恶性疟为主,为1 766例（占77.0%),其中加纳感染病例最多,为1 761例（占76.8%);来自东南亚感染共26例（占 1.1%),虫种以间日疟为主,为14例（占53.8%)其中印度尼西亚感染病例最多,为14例（占53.8%)。 结论 上林县境 外输人性疟疾防控形势十分严峻,进一步加强出国务工人员的疟疾监测和管理是巩固消除疟疾成果的关键。