Ação de mosquiteiros impregnados com deltametrina sobre a morbidade da malária em uma área da Amazônia Brasileira

Santos, João Barberino; Santos, Fernando J.; Marsden, Philip D.; Tosta, Carlos Eduardo; Andrade, Ana Lúcia; Macêdo, Vanize

doi:10.1590/s0037-86821998000100001

Cited by 11 publications

(9 citation statements)

References 24 publications

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“…Unfortunately, there is no systematic information concerning acceptability of these methods in the two communities. In Southern Brazilian Amazon, impregnated mosquito nets were not effective in controlling malaria [38]. In Guatemala and Nicaragua, malaria incidence was significantly lower in populations using insecticide-impregnated bed nets [39,40].…”

Section: Discussionmentioning

confidence: 99%

Integrated vector management targeting Anopheles darlingi populations decreases malaria incidence in an unstable transmission area, in the rural Brazilian Amazon

Martins-Campos

Pinheiro

Vítor-Silva

et al. 2012

Malar J

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BackgroundStudies on vector behaviour should be conducted in order to evaluate the effectiveness of vector control measures on malaria protection in endemic areas of Latin America, where P. vivax predominates. This work aims to investigate the fauna of anopheline mosquitoes and verify the impact of integrated vector management in two colonization projects in the Careiro Municipality, Western Brazilian Amazon.MethodsFour mosquitoes’ captures were carried out from August 2008 to March 2010, with an interval of six months between each collection. Since September 2009 a large programme to reduce the burden of malaria has started in the two communities by distribution of insecticide-treated bed nets (ITN) and intensification of indoor residual spraying (IRS). Human biting rates (HBRs), entomological inoculation rates (EIRs), malaria incidence rate (MIR) and Plasmodium carrier’s prevalence were used as outcomes to estimate the impact of the control measures.ResultsA total of 3,189 anophelines were collected, belonging to 13 species. Anopheles darlingi was the predominant species in the period (42.6%), followed by Anopheles albitarsis (38.4%). An. darlingi HBRs showed a notable decreasing trend from the start to the end of the study. Conversely, An. albitarsis increased its contribution to overall HBRs throughout the study. For An. darlingi there was a significant positive correlation between HBRs and MIR (p = 0.002). Anopheles albitarsis HBRs showed a significant negative correlation with the corresponding MIR (p = 0.045). EIR from total anophelines and from An. darlingi and An. albitarsis presented decreasing patterns in the successive collections. Four species of anophelines (An. darlingi, An. albitarsis, Anopheles braziliensis and Anopheles nuneztovari) were naturally infected with Plasmodium, albeit at very low infection rates. There were a decrease in the MIR for both vivax and falciparum malaria and in the prevalence of Plasmodium vivax and Plasmodium falciparum carriers during the period of study.ConclusionsThere is strong evidence of association between the density of An. darlingi and the incidence of malaria in the studies sites, further highlighting the importance of this vector in malaria transmission in this region. An. darlingi susceptibility to control using ITN and IRS is likely to be high in the rural settlements studied.

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Section: Discussionmentioning

confidence: 99%

Integrated vector management targeting Anopheles darlingi populations decreases malaria incidence in an unstable transmission area, in the rural Brazilian Amazon

Martins-Campos

Pinheiro

Vítor-Silva

et al. 2012

Malar J

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“…Malaria is one of the tropical diseases that most affect human health in the Amazon, lessening sufferers' ability to work and worsening their quality of life, which has a negative impact on the State of Rondônia and the Amazon region as a whole [7,19].…”

Section: Discussionmentioning

confidence: 99%

Reduction of incidence and relapse or recrudescence cases of malaria in the western region of the Brazilian Amazon

Vieira

Gim

Zaqueo

et al. 2014

J Infect Dev Ctries

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Introduction: Malaria is one of the major parasitic diseases in the State of Rondônia, located in the western Brazilian Amazon. The basic treatment scheme for this disease is chloroquine and primaquine. This study evaluated the epidemiological profile of malaria in Rondônia between 2008 and 2012. Methodology: The epidemiological data were provided by the Health Surveillance Agency from the State of Rondônia, and socioeconomic indicators were obtained from the Brazilian Institute of Geography and Statistics, Department of Informatics of the Unified Health System, and from the National Institute for Space Research. The analyzed variables included year of diagnosis, gender, age group, main activity performed in the 15 days previous to the diagnosis, parasite species, level of parasitemia, number of relapse/recrudescence cases, and socioeconomic and environmental data for Rondônia. Results: A total of 238,626 cases of malaria were recorded in Rondônia during the study period. Of this total, 65.6% were men and the most prevalent age group was 20-39 years. Plasmodium vivax was the most common parasite (89.8%), followed by Plasmodium falciparum (9.4%). An average of 30.9% of the individuals who were tested presented with relapse/recrudescence malaria. The API value was highest in 2008 and lowest in 2012, corresponding to 42.3 cases and 19.2 cases per 1,000 inhabitants, respectively. Conclusions: A 58% reduction in the number of malaria cases and a 36.2% reduction in the number of relapse/recrudescence malaria cases were observed, due to increases in the economy, improvements in the health system, and reduction of deforestation in this region.

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“…O tecido e a linha de costura foram doados gratuitamente, e os mosquiteiros foram confeccionados pelas próprias famílias ou, pela vizinha mais próxima que possuísse máquina de costura. O método e a dose de impregnação utilizados já foram descritos anteriormente 25 .…”

Section: Methodsunclassified

Ação de mosquiteiros impregnados com deltametrina sobre a morbidade da malária em uma área da Amazônia Brasileira

Abstract: Resumo

Cited by 11 publications

References 24 publications

Integrated vector management targeting Anopheles darlingi populations decreases malaria incidence in an unstable transmission area, in the rural Brazilian Amazon

Integrated vector management targeting Anopheles darlingi populations decreases malaria incidence in an unstable transmission area, in the rural Brazilian Amazon

Reduction of incidence and relapse or recrudescence cases of malaria in the western region of the Brazilian Amazon

Baixa aderência e alto custo como fatores de insucesso do uso de mosquiteiros impregnados com inseticida no controle da malária na Amazônia Brasileira

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