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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; Li, Zhongjie

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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...[Show more]

dc.contributor.authorZhang, Qian
dc.contributor.authorSun, Junling
dc.contributor.authorZhang, Zike
dc.contributor.authorGeng, Qibin
dc.contributor.authorLai, Shengjie
dc.contributor.authorHu, Wenbiao
dc.contributor.authorClements, Archie
dc.contributor.authorLi, Zhongjie
dc.date.accessioned2018-08-13T04:24:08Z
dc.date.available2018-08-13T04:24:08Z
dc.identifier.urihttp://hdl.handle.net/1885/146264
dc.description.abstractBACKGROUND 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.
dc.description.sponsorshipThis study was supported by grants from the Ministry of Science and Technology of China (2012ZX10004-201, 2012ZX10004-220, 2014BAI13B05) and the Ministry of Health of China (No. 201202006).
dc.format9 pages
dc.format.mimetypeapplication/pdf
dc.publisherBioMed Central
dc.rights© The Author(s) 2016. This 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.
dc.sourceMalaria journal
dc.subjectborder
dc.subjectChina
dc.subjectelimination
dc.subjectepidemiology
dc.subjectmalaria
dc.subjectadult
dc.subjectfemale
dc.subjecthumans
dc.subjectmalaria, falciparum
dc.subjectmalaria, vivax
dc.subjectmale
dc.subjectprevalence
dc.subjectrisk assessment
dc.subjectseasons
dc.subjectspatio-temporal analysis
dc.subjecttravel
dc.titleRisk assessment of malaria in land border regions of China in the context of malaria elimination
dc.typeJournal article
local.identifier.citationvolume15
dcterms.dateAccepted2016-10-28
dc.date.issued2016-11-08
local.identifier.ariespublicationU3488905xPUB25072
local.publisher.urlhttps://www.biomedcentral.com/
local.type.statusPublished Version
local.contributor.affiliationClements, Archie. C. A., Department of Global Health, CHM Research School of Population Health, The Australian National University
local.identifier.essn1475-2875
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage546
local.identifier.doi10.1186/s12936-016-1590-1
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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