Analysis on malaria epidemic and control measures in Baoshan City of Yunnan Province in 2023

doi:10.12140/j.issn.1000-7423.2024.03.020

Abstract

Abstract:

To understand the malaria epidemic situation and prevention and control measures in Baoshan City of Yunnan Province in 2023, the malaria epidemic data was collected from the Chinese Disease Prevention and Control Information System, and the completion status of various task indicators for preventing the import and re-transmission of malaria was collected from related reports. The database was established by Microsoft Excel 2021 software, and SPSS 26.0 software was used for statistical analysis. In 2023, 55 malaria cases were reported in Baoshan City, all of which were imported from abroad. Among them, 51 cases were vivax malaria, 2 cases were falciparum malaria, 1 case was malariae malariae and 1 case was ovale malaria. Regional distribution in Tengchong City accounted for 41 cases (74.6%). The sex distribution was mainly male 91.9% (50/55), and female 9.1% (5/55). In the age distribution, the youngest was 10 years old, and the oldest was 67 years old. The number of cases in the 30-34-years-old group was the largest, with 11 cases, accounting for 20.0%. The occupation distribution was mainly farmers, with 35 cases (63.6%). In addition to no cases in February, all cases were reported in other months, and the peak month was June, with 14 cases (25.5%). The main source of infection was Myanmar, where 51 cases (92.7%) were imported. Throughout the year, blood tests of fever patients were carried out for 16 271 cases, with 42 active case investigations conducting in key villages, 21 vector investigations conducting, 56 sites with case identified investigating and prevention measures performing, 98 times of supervision conducting, 10 times of skill training conducting, and 611 personnel training. The imported case number of malaria in 2023 in Baoshan City is significantly higher than that in 2022 (5 cases). it is necessary to strengthen the control capacity at all levels, improve the monitoring sensitivity, earnestly implement the “1-3-7” approach, and continue to consolidate the results of malaria elimination.

Key words: Malaria, Epidemic characteristics, Control measure, Baoshan City

CLC Number:

R531.3

YANG Hexian, HUANG Dongsheng, NIE Fangang. Analysis on malaria epidemic and control measures in Baoshan City of Yunnan Province in 2023[J]. CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES, 2024, 42(3): 418-420.

Figures/Tables 2

References 10

[1]	Yang HX, Li JQ. Epidemiological characteristics of imported malaria during 2013—2019 in Baoshan City, Yunnan Province[J]. Chin J Parasitol Parasit Dis, 2019, 38(5): 660-663. (in Chinese)
	(杨和仙, 李加全. 云南省保山市2013—2019年境外输入性疟疾流行特征分析[J]. 中国寄生虫学与寄生虫病杂志, 2020, 38(5): 660-663.) doi: 10.12140/j.issn.1000-7423.2020.05.022
[2]	Wu DN, Zhang HX, Zhu H, et al. Epidemic characteristics of malaria cases before and after elimination in Hubei Province[J]. China Trop Med, 2023, 23(6): 579-584. (in Chinese)
	(吴冬妮, 张华勋, 朱红, 等. 湖北省消除疟疾前后疟疾疫情变化趋势分析[J]. 中国热带医学, 2023, 23(6): 579-584.) doi: 10.13604/j.cnki.46-1064/r.2023.06.04
[3]	Zhang L, Feng J, Tu H, et al. Malaria epidemiology in China in 2020[J]. Chin J Parasitol Parasit Dis, 2021, 39(2): 195-199. (in Chinese)
	(张丽, 丰俊, 涂宏, 等. 2020年全国疟疾疫情分析[J]. 中国寄生虫学与寄生虫病杂志, 2021, 39(2): 195-199.) doi: 10.12140/j.issn.1000-7423.2021.02.012
[4]	Zhang L, Yi BY, Xia ZG, et al. Epidemiological characteristics of malaria in China, 2021[J]. Chin J Parasitol Parasit Dis, 2022, 40(2): 135-139.
	(张丽, 易博禹, 夏志贵, 等. 2021年全国疟疾疫情特征分析[J]. 中国寄生虫学与寄生虫病杂志, 2022, 40(2): 135-139.) doi: 10.12140/j.issn.1000-7423.2022.02.001
[5]	Zhang L, Yi BY, Yin JH, et al. Epidemic characteristics of malaria in China, 2022[J]. Chin J Parasitol Parasit Dis, 2023, 41(2): 137-141. (in Chinese)
	(张丽, 易博禹, 尹建海, 等. 2022年全国疟疾疫情特征分析[J]. 中国寄生虫学与寄生虫病杂志, 2023, 41(2): 137-141.) doi: 10.12140/j.issn.1000-7423.2023.02.002
[6]	Wang JZ, Ma Q, Yang HX, et al. Malaria epidemiological characteristics in Baoshan City in 2017[J]. Chin J Parasitol Parasit Dis, 2018, 36(5): 536-538. (in Chinese)
	(王加志, 马强, 杨和仙, 等. 2017年保山市疟疾流行病学特征分析[J]. 中国寄生虫学与寄生虫病杂志, 2018, 36(5): 536-538.)
[7]	Gao Q. Risk and countermeasures of re-establishment after malaria elimination in China[J]. China Trop Med, 2024, 24(1): 1-5. (in Chinese)
	(高琪. 当前疟疾形势与我国消除疟疾后的再传播风险与对策[J]. 中国热带医学, 2024, 24(1): 1-5.) doi: 10.13604/j.cnki.46-1064/r.2024.01.01
[8]	Yang HX, Nie FG, Yang MQ, et al. Analysis on malaria epidemic situation and prevention during the 13th Five-Year Plan period in Baoshan City[J]. J Trop Med, 2022, 22(10): 1441-1449. (in Chinese)
	(杨和仙, 聂凡刚, 杨明强, 等. 保山市“十三五”期间疟疾疫情及防治分析[J]. 热带医学杂志, 2022, 22(10): 1441-1449.)
[9]	Feng J, Zhang L, Tu H, et al. From elimination to post-elimination: characteristics, challenges and re-transmission preventing strategy of imported malaria in China[J]. China Trop Med, 2021, 21(1): 5-10. (in Chinese)
	(丰俊, 张丽, 涂宏, 等. 从消除到消除后: 中国输入性疟疾的疫情特征、挑战及防止再传播策略[J]. 中国热带医学, 2021, 21(1): 5-10.) doi: 10.13604/j.cnki.46-1064/r.2021.01.02
[10]	Yin JH, Xia ZG. Consolidating the achievements of malaria elimination and preventing re-establishment of transmission: main challenges and priorities of malaria prevention and control in post-elimination era in China[J]. J Trop Dis Parasitol, 2022, 20(5): 241-299. (in Chinese)
	(尹建海, 夏志贵. 巩固消除疟疾成果, 防止再传播——我国消除疟疾后主要挑战与工作重点[J]. 热带病与寄生虫学, 2022, 20(5): 241-299.

年龄组/岁	病例数/例	构成比/%
0~19	2	3.6
20~24	2	3.6
25~29	9	16.4
30~34	11	20.0
35~39	7	12.7
40~44	6	10.9
45~49	8	14.5
50~54	4	7.3
55~59	3	5.5
60~67	3	5.5
合计	55	100

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