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      Malaria control along China-Myanmar Border during 2007–2013: an integrated impact evaluation

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          Abstract

          Background

          Implementing effective interventions remain a lot of difficulties along all border regions. The emergence of artemisinin resistance of Plasmodium falciparum strains in the Greater Mekong Subregion is a matter of great concern. China has effectively controlled cross-border transmission of malaria and artemisinin resistance of P. falciparum along the China-Myanmar border.

          Methods

          A combined quantitative and qualitative study was used to collect data, and then an integrated impact evaluation was conducted to malaria control along the China-Myanmar border during 2007–2013.

          Results

          The parasite prevalence rate (PPR) in the five special regions of Myanmar was decreased from 13.6 % in March 2008 to 1.5 % in November 2013. Compared with the baseline (PPR in March 2008), the risk ratio was only 0.11 [95 % confidence interval ( CI), 0.09–0. 14) in November 2013, which is equal to an 89 % reduction in the malaria burden. Annual parasite incidence (API) across 19 Chinese border counties was reduced from 19.6 per 10 000 person-years in 2006 to 0.9 per 10 000 person-years in 2013. Compared with the baseline (API in 2006), the API rate ratio was only 0.05(95 % CI, 0.04–0.05) in 2013, which equates to a reduction of the malaria burden by 95.0 %. Meanwhile, the health service system was strengthened and health inequity of marginalized populations reduced along the international border.

          Conclusion

          The effective collaboration between China, Myanmar and the international non-governmental organization promptly carried out the core interventions through simplified processes. The integrated approaches dramatically decreased malaria burden of Chinese-Myanmar border.

          Electronic supplementary material

          The online version of this article (doi:10.1186/s40249-016-0171-4) contains supplementary material, which is available to authorized users.

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          Most cited references21

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          Emergence of artemisinin-resistant malaria on the western border of Thailand: a longitudinal study

          Summary Background Artemisinin-resistant falciparum malaria has arisen in western Cambodia. A concerted international effort is underway to contain artemisinin-resistant Plasmodium falciparum, but containment strategies are dependent on whether resistance has emerged elsewhere. We aimed to establish whether artemisinin resistance has spread or emerged on the Thailand–Myanmar (Burma) border. Methods In malaria clinics located along the northwestern border of Thailand, we measured six hourly parasite counts in patients with uncomplicated hyperparasitaemic falciparum malaria (≥4% infected red blood cells) who had been given various oral artesunate-containing regimens since 2001. Parasite clearance half-lives were estimated and parasites were genotyped for 93 single nucleotide polymorphisms. Findings 3202 patients were studied between 2001 and 2010. Parasite clearance half-lives lengthened from a geometric mean of 2·6 h (95% CI 2·5–2·7) in 2001, to 3·7 h (3·6–3·8) in 2010, compared with a mean of 5·5 h (5·2–5·9) in 119 patients in western Cambodia measured between 2007 and 2010. The proportion of slow-clearing infections (half-life ≥6·2 h) increased from 0·6% in 2001, to 20% in 2010, compared with 42% in western Cambodia between 2007 and 2010. Of 1583 infections genotyped, 148 multilocus parasite genotypes were identified, each of which infected between two and 13 patients. The proportion of variation in parasite clearance attributable to parasite genetics increased from 30% between 2001 and 2004, to 66% between 2007 and 2010. Interpretation Genetically determined artemisinin resistance in P falciparum emerged along the Thailand–Myanmar border at least 8 years ago and has since increased substantially. At this rate of increase, resistance will reach rates reported in western Cambodia in 2–6 years. Funding The Wellcome Trust and National Institutes of Health.
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            A Single Mutation in K13 Predominates in Southern China and Is Associated With Delayed Clearance of Plasmodium falciparum Following Artemisinin Treatment.

            Artemisinin resistance in Plasmodium falciparum has emerged in Southeast Asia and poses a threat to malaria control and elimination. Mutations in a P. falciparum gene encoding a kelch protein on chromosome 13 have been associated with delayed parasite clearance following artemisinin treatment elsewhere in the region, but not yet in China.
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              Malaria trends and challenges in the Greater Mekong Subregion.

              This report provides an overview of the epidemiological patterns of malaria in the Greater Mekong Subregion (GMS) from 1998 to 2007, and highlights critical challenges facing national malaria control programs and partners in effort to build on their successes as they move towards malaria pre-elimination and elimination as a programmatic goal. Epidemiological data provided by malaria programs show a drastic decline in malaria deaths and confirmed malaria positive cases over the last 10 years in the GMS. More than half of confirmed malaria cases and deaths recorded in the GMS occur in Myanmar, however, reporting methods and data management are not comparable between countries despite effort made by WHO to harmonize data collection, analysis and reporting among WHO Member States. Malaria is concentrated in forested/forest-fringe areas of the region mainly along international borders providing strong rationale to develop harmonized cross-border pre-elimination programs in conjunction with national efforts. Across the Mekong Region, the declining efficacy of recommended first-line antimalarials, eg artemisinin-based combination therapies (ACTs) against falciparum malaria on the Cambodia-Thailand border, the prevalence of counterfeit and substandard antimalarial drugs, the lack of health services in general and malaria services in particular in remote settings, and the lack of information and services targeting migrants and mobile population present important barriers to reach or maintain malaria pre-elimination programmatic goals. Strengthening networking between research institutions and non-government organizations will increase knowledge-based decision and action.
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                Author and article information

                Contributors
                xjw426@163.com
                13577141458@163.com
                yanghenglin2014@126.com
                zhangjun720@126.com
                zzxsm@126.com
                yangymsm@126.com
                zhn@yipd.org
                jhavuma@gmail.com
                lhxl@foxmail.com
                liubible@126.com
                zhouhuatmc@126.com
                xiexinyu@gmail.com
                dongjiaqianghu@126.com
                interpzhang@163.com
                790692406@qq.com
                libo0209@gmail.com
                jiayinli83@gmail.com
                yangzi0820@yahoo.com.cn
                wangpiyu@126.com
                libefu@163.com
                Journal
                Infect Dis Poverty
                Infect Dis Poverty
                Infectious Diseases of Poverty
                BioMed Central (London )
                2049-9957
                10 August 2016
                10 August 2016
                2016
                : 5
                : 75
                Affiliations
                [1 ]Yunnan Institute of Parasitic Diseases, Yunnan Provincial Center of Malaria Research, Yunnan Provincial Collaborative Innovation Center for Public Health and Disease Prevention and Control, Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Puer, 665000 China
                [2 ]Yunnan Provincial Health and Family Planning Commission, Kunming, 650200 People’s Republic of China
                [3 ]Yunnan Office of Health Poverty Action, Kunming, 650041 People’s Republic of China
                [4 ]World Health Organization Regional Office for the Western Pacific, P.O. Box 2932, 1000 Manila, Philippines
                [5 ]Foundation for Innovative New Diagnostics, 1216 Cointrin, Geneva Switzerland
                Article
                171
                10.1186/s40249-016-0171-4
                4979141
                27507163
                bc4fe25f-8efc-4b2a-b66c-7f259d55d18e
                © 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.

                History
                : 29 November 2015
                : 11 July 2016
                Funding
                Funded by: National Natural Science Foundation of China (CN)
                Award ID: 81560543
                Award Recipient :
                Funded by: the Global Fund to fight AIDS, Tuberculosis and Malaria
                Award ID: CHN-607-G09-M
                Funded by: the Global Fund to fight AIDS, Tuberculosis and Malaria
                Award ID: CHN-011-G15-M
                Categories
                Research Article
                Custom metadata
                © The Author(s) 2016

                border malaria,control,artemisinin resistance,china-myanmar border

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