Time trends and changes in the distribution of malaria cases in the Brazilian Amazon Region, 2004-2013

Lima, Isac da Silva Ferreira; Lapouble, Oscar M. M.; Duarte, Elisabeth Carmen

doi:10.1590/0074-02760160263

Cited by 22 publications

(29 citation statements)

References 25 publications

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“…Across the Brazilian Amazon, the proportion of P. falciparum cases has been declining steadily for several years ( Table 1), and in 2015, this parasite comprised approximately 11% of all cases, with P. vivax responsible for the remaining 89% [4]. In 2015, the Brazilian Ministry of Health (MOH) launched The Plan for Elimination of Malaria in Brazil, which focuses on the elimination of P. falciparum [46]. It is comprehensive, but substantial challenges remain: behavioral heterogeneity of the primary vector Ny.…”

Section: Towards Malaria Elimination -A Leap Forwardmentioning

confidence: 99%

Malaria Transmission in South America—Present Status and Prospects for Elimination

Conn¹,

Grillet²,

Correa³

et al. 2018

Towards Malaria Elimination - A Leap Forward

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Four countries (Brazil, Colombia, Peru, and Venezuela) together contributed ~80% of the 875,000 malaria cases reported in the Latin American region (2016). During the 10-year period (2005-2015) when global malaria incidence was dramatically reduced, Brazil and Colombia were an integral part of this trend, on track to meet the mid-term 2020 goal established by the World Health Organization. In Colombia, since 2015 at the cessation of a five-year globally funded malaria program, both incidence and proportion of Plasmodium falciparum infections have increased, mainly due to the budget constraints. Similarly, despite a strong record and major recognition for reducing malaria, in 2017, Brazil has seen a resurgence of malaria cases, but no increase in the proportion of Plasmodium falciparum to P. vivax. A globally funded malaria control program in Peru from 2005 to 2010 resulted in appreciable reduction in the annual parasitic incidence down to 1/1000 by 2011-2012, but soon after, the annual malaria incidence began to rise and by the end of 2017, there were 53,261 reported cases. To add to Venezuela's political and financial woes, malaria continues to increase, such that, 300,189 cases were reported by the end of week 42, 2017. The only rational pathway to malaria elimination is sustained nation-level financial support that does not fall prey to political vicissitudes.

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Section: Towards Malaria Elimination -A Leap Forwardmentioning

confidence: 99%

Malaria Transmission in South America—Present Status and Prospects for Elimination

Conn¹,

Grillet²,

Correa³

et al. 2018

Towards Malaria Elimination - A Leap Forward

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“…24 Research on malaria incidence trends in the brazilian Amazon between 2004 and 2013, also identified that the four states mentioned in this paragraph are among those where the risk of contracting malaria in the region is greater, despite Roraima having a falling trend in the period. 25 The spatial pattern of the distribution of the epidemics in the municipalities formed clusters according to their duration. The global Moran index found that the 'proportion of epidemiological weeks' variable was correlated positively in space, thus confirming the spatial dependence of epidemics among the region's municipalities.…”

Section: Malaria Transmission Elimination In the Brazilian Amazon 2016mentioning

confidence: 99%

Análise do processo de eliminação da transmissão da malária na Amazônia brasileira com abordagem espacial da variação da incidência da doença em 2016*

Braz¹,

Barcellos²

2018

Epidemiologia e Serviços de Saúde

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Objective: to identify areas where malaria transmission has been eliminated and levels of malaria incidence variation in the brazilian Amazon in 2016, and to present an indicator of priorities for control actions. Methods: an ecological study was conducted with data from the Malaria Epidemiological Surveillance Information System (Sivep-Malaria); municipalities were classified into three groups-elimination achieved, in the process of elimination and in search of reduction-; a compound indicator was created to stratify municipalities prioritized for control actions. Results: a total of 337 (41.7%) municipalities were found to have achieved elimination, 398 (49.3%) were in the process of elimination and 73 (9.0%) were in search of reduction; the priority indicator created identified 71 municipalities that accounted for 95% of cases. Conclusion: the vast majority of municipalities have already achieved elimination of malaria transmission or are in the process of eliminating transmission; the priority indicator may contribute to targeting malaria control actions.

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“…Interestingly, however, we did not nd a correlation of API between the two sides. API is de ned as the number of con rmed new cases expressed per 1,000 individuals under surveillance in a speci c year, and it usually refers to areas of high and moderate malaria transmission risk [56,57]. The study data was obtained from the China-Myanmar border, which showed low to moderate transmission of malaria with a large mobile population and local population.…”

Section: Discussionmentioning

confidence: 99%

From Control to Elimination: A Spatial-Temporal Analysis of Malaria Along the China-Myanmar Border

Huang¹,

Zhang²,

Xue³

et al. 2020

Preprint

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Background: Malaria cases have declined significantly along the China-Myanmar border in the past 10 years and this region is going through a process from control to elimination. The aim of this study is to investigate the epidemiology of malaria along the border, will identify challenges in the progress from control to elimination. Methods: National reported malaria cases from China and Myanmar, along with the data of 18 Chinese border counties and 23 townships in Myanmar were obtained from a web-based diseases information reporting system in China and the national malaria control program of Myanmar, respectively. Epidemiological data was analyzed, including the number of reported cases, annual parasite index and proportion of vivax infection. Spatial mapping of the API at county or township level in 2014 and 2018 was performed by ArcGIS. The relationship of malaria endemicity on both sides of the border was evaluated by regression analysis. Results: The number of reported malaria cases and API declined in the border counties or townships. In 2014, 392 malaria cases were reported from 18 Chinese border counties, including 8.42% indigenous cases and 91.58%% imported cases, while the highest API (0.11) was occurred in Yingjiang County. There have been no indigenous cases reported since 2017, but 164 imported cases were reported in 2018 and 97.56% were imported from Myanmar. The average API in 2014 in 23 Myanmar townships was significantly greater than that of 18 Chinese counties (P<0.01). However, the API decreased significantly in Myanmar side from 2014 to 2018 (P<0.01). The number of townships with an API between 0~1 increased to 15 in 2018, compared to only five in 2014, while still four townships had API>10. Plasmodium vivax was the predominant species along the border. The number of reported malaria cases and the proportion of vivax infection in the 18 Chinese counties were strongly correlated with those of the 23 Myanmar townships (P<0.05).Conclusions: Malaria elimination is approaching along the China-Myanmar border. However, in order to achieve the malaria elimination in this region and prevent the re-establishment of malaria in China after elimination, continued political, financial and scientific commitment is required.

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Time trends and changes in the distribution of malaria cases in the Brazilian Amazon Region, 2004-2013

Cited by 22 publications

References 25 publications

Malaria Transmission in South America—Present Status and Prospects for Elimination

Malaria Transmission in South America—Present Status and Prospects for Elimination

Análise do processo de eliminação da transmissão da malária na Amazônia brasileira com abordagem espacial da variação da incidência da doença em 2016*

From Control to Elimination: A Spatial-Temporal Analysis of Malaria Along the China-Myanmar Border

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