Cargando…
Risk assessment of malaria in land border regions of China in the context of malaria elimination
BACKGROUND: Cross-border malaria transmission poses a challenge for countries to achieve and maintain malaria elimination. Because of a dramatic increase of cross-border population movement between China and 14 neighbouring countries, the malaria epidemic risk in China’s land border regions needs to...
Autores principales: | , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5101710/ https://www.ncbi.nlm.nih.gov/pubmed/27825379 http://dx.doi.org/10.1186/s12936-016-1590-1 |
_version_ | 1782466333120659456 |
---|---|
author | Zhang, Qian Sun, Junling Zhang, Zike Geng, Qibin Lai, Shengjie Hu, Wenbiao Clements, Archie C. A. Li, Zhongjie |
author_facet | Zhang, Qian Sun, Junling Zhang, Zike Geng, Qibin Lai, Shengjie Hu, Wenbiao Clements, Archie C. A. Li, Zhongjie |
author_sort | Zhang, Qian |
collection | PubMed |
description | BACKGROUND: Cross-border malaria transmission poses a challenge for countries to achieve and maintain malaria elimination. Because of a dramatic increase of cross-border population movement between China and 14 neighbouring countries, the malaria epidemic risk in China’s land border regions needs to be understood. METHODS: In this study, individual case-based epidemiological data on malaria in the 136 counties of China with international land borders, from 2011 to 2014, were extracted from the National Infectious Disease Information System. The Plasmodium species, seasonality, spatiotemporal distribution and changing features of imported and indigenous cases were analysed using descriptive spatial and temporal methods. RESULTS: A total of 1948 malaria cases were reported, with 1406 (72.2%) imported cases and 542 (27.8%) indigenous cases. Plasmodium vivax is the predominant species, with 1536 malaria cases occurrence (78.9%), following by Plasmodium falciparum (361 cases, 18.5%), and the others (51 cases, 2.6%). The magnitude and geographic distribution of malaria in land border counties shrunk sharply during the elimination period. Imported malaria cases were with a peak of 546 cases in 2011, decreasing yearly in the following years. The number of counties with imported cases decreased from 28 counties in 2011 to 26 counties in 2014. Indigenous malaria cases presented a markedly decreasing trend, with 319 indigenous cases in 2011 reducing to only 33 indigenous cases in 2014. The number of counties with indigenous cases reduced from 26 counties in 2011 to 10 counties in 2014. However, several bordering counties of Yunnan province adjacent to Myanmar reported indigenous malaria cases in the four consecutive years from 2011 to 2014. CONCLUSIONS: The scale and extent of malaria occurrence in the international land border counties of China decreased dramatically during the elimination period. However, several high-risk counties, especially along the China–Myanmar border, still face a persistent risk of malaria introduction and transmission. The study emphasizes the importance and urgency of cross-border cooperation between neighbouring countries to jointly face malaria threats to elimination goals. |
format | Online Article Text |
id | pubmed-5101710 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-51017102016-11-10 Risk assessment of malaria in land border regions of China in the context of malaria elimination Zhang, Qian Sun, Junling Zhang, Zike Geng, Qibin Lai, Shengjie Hu, Wenbiao Clements, Archie C. A. Li, Zhongjie Malar J Research BACKGROUND: Cross-border malaria transmission poses a challenge for countries to achieve and maintain malaria elimination. Because of a dramatic increase of cross-border population movement between China and 14 neighbouring countries, the malaria epidemic risk in China’s land border regions needs to be understood. METHODS: In this study, individual case-based epidemiological data on malaria in the 136 counties of China with international land borders, from 2011 to 2014, were extracted from the National Infectious Disease Information System. The Plasmodium species, seasonality, spatiotemporal distribution and changing features of imported and indigenous cases were analysed using descriptive spatial and temporal methods. RESULTS: A total of 1948 malaria cases were reported, with 1406 (72.2%) imported cases and 542 (27.8%) indigenous cases. Plasmodium vivax is the predominant species, with 1536 malaria cases occurrence (78.9%), following by Plasmodium falciparum (361 cases, 18.5%), and the others (51 cases, 2.6%). The magnitude and geographic distribution of malaria in land border counties shrunk sharply during the elimination period. Imported malaria cases were with a peak of 546 cases in 2011, decreasing yearly in the following years. The number of counties with imported cases decreased from 28 counties in 2011 to 26 counties in 2014. Indigenous malaria cases presented a markedly decreasing trend, with 319 indigenous cases in 2011 reducing to only 33 indigenous cases in 2014. The number of counties with indigenous cases reduced from 26 counties in 2011 to 10 counties in 2014. However, several bordering counties of Yunnan province adjacent to Myanmar reported indigenous malaria cases in the four consecutive years from 2011 to 2014. CONCLUSIONS: The scale and extent of malaria occurrence in the international land border counties of China decreased dramatically during the elimination period. However, several high-risk counties, especially along the China–Myanmar border, still face a persistent risk of malaria introduction and transmission. The study emphasizes the importance and urgency of cross-border cooperation between neighbouring countries to jointly face malaria threats to elimination goals. BioMed Central 2016-11-08 /pmc/articles/PMC5101710/ /pubmed/27825379 http://dx.doi.org/10.1186/s12936-016-1590-1 Text en © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
spellingShingle | Research Zhang, Qian Sun, Junling Zhang, Zike Geng, Qibin Lai, Shengjie Hu, Wenbiao Clements, Archie C. A. Li, Zhongjie Risk assessment of malaria in land border regions of China in the context of malaria elimination |
title | Risk assessment of malaria in land border regions of China in the context of malaria elimination |
title_full | Risk assessment of malaria in land border regions of China in the context of malaria elimination |
title_fullStr | Risk assessment of malaria in land border regions of China in the context of malaria elimination |
title_full_unstemmed | Risk assessment of malaria in land border regions of China in the context of malaria elimination |
title_short | Risk assessment of malaria in land border regions of China in the context of malaria elimination |
title_sort | risk assessment of malaria in land border regions of china in the context of malaria elimination |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5101710/ https://www.ncbi.nlm.nih.gov/pubmed/27825379 http://dx.doi.org/10.1186/s12936-016-1590-1 |
work_keys_str_mv | AT zhangqian riskassessmentofmalariainlandborderregionsofchinainthecontextofmalariaelimination AT sunjunling riskassessmentofmalariainlandborderregionsofchinainthecontextofmalariaelimination AT zhangzike riskassessmentofmalariainlandborderregionsofchinainthecontextofmalariaelimination AT gengqibin riskassessmentofmalariainlandborderregionsofchinainthecontextofmalariaelimination AT laishengjie riskassessmentofmalariainlandborderregionsofchinainthecontextofmalariaelimination AT huwenbiao riskassessmentofmalariainlandborderregionsofchinainthecontextofmalariaelimination AT clementsarchieca riskassessmentofmalariainlandborderregionsofchinainthecontextofmalariaelimination AT lizhongjie riskassessmentofmalariainlandborderregionsofchinainthecontextofmalariaelimination |