Analysis of imported malaria cases in Leshan City from 2012 to 2018

Abstract

Objective To analyze the epidemiological characteristics of reported malaria cases in Leshan City, so as to provide insights into malaria control.

Methods The data pertaining to malaria cases and epidemiological individual information in Leshan City from 2012 to 2018 were captured from the National Notifiable Communicable Disease Reporting System and the Information System for Parasitic Diseases Control and Prevention, and a descriptive epidemiological analysis was performed.

Results A total of 34 malaria cases were reported in Leshan City from 2012 to 2018, and all cases were confirmed as imported malaria cases by Sichuan provincial malaria diagnosis reference laboratory. Of all 34 cases, there were 14 vivax malaria cases, 18 falciparum malaria cases, a malariae malaria case and an ovale malaria case. The sites where malaria parasite infections occurred mainly included African areas (accounting for 58.82%) and Southeastern Asian areas (accounting for 29.41%), and the malaria cases were mainly reported in January, February, June and July, which accounted for 65.63% of all cases. The cases included 33 men and a woman, and had ages of 21 to 59 years. The cases’occupations mainly involved overseas peasants, technical workers and businessmen. The duration from onset of malaria to diagnosis ranged from 0 to 31 days, and the percentage of definitive diagnosis was 85.29% at initial diagnosis.

Conclusions There are no local malaria cases in Leshan City; however, imported malaria cases are reported. The monitoring, management and health education of overseas returners should be further strengthened and malaria training should be improved to enhance the diagnostic and treatment capability in professionals, so as to consolidate malaria control achievements.

Abstract

[ 摘要] 目的 分析乐山市疟疾报告病例的流行特征, 为疟疾防治工作提供参考。 方法 通过国家传染病报告信息管 理系统和寄生虫病防治信息管理系统, 收集2012–2018年乐山市疟疾病例信息、流行病学个案信息等相关资料, 并进行 流行病学描述性分析。 结果 2012–2018 年乐山市共报告34 例疟疾病例, 均为经省级疟疾诊断参比实验室确诊的输入 性病例, 其中间日疟14例、恶性疟18 例、三日疟1 例、卵形疟1例。感染来源地主要为非洲地区 (占58.82%) 和东南亚地 区 (占29.41%), 报告病例较多的月份为1、2、6月和7月, 占病例总数的65.63%; 男、女性病例分别为33例和1例; 职业主 要以赴境外劳务的农民、技术工人和经商者居多, 年龄在21～59岁。患者从发病到就诊间隔时间最短0 d、最长31 d; 初 次就诊确诊率为85.29%。 结论 乐山市已无本地感染疟疾病例, 但存在输入性疟疾病例。应继续加强对境外归国人员 的监测管理和健康教育工作, 并加强培训、提高专业人员诊治能力, 以巩固疟疾防治成果。