Evidence of new species for malaria vector Anopheles nuneztovari sensu lato in the Brazilian Amazon region

Scarpassa, Vera Margarete; Cunha-Machado, Antônio Saulo; Saraiva, José Ferreira

doi:10.1186/s12936-016-1217-6

Cited by 28 publications

(33 citation statements)

References 54 publications

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“…albimanus , and 99% for An. nuneztovari [34]. Concordance between molecular and morphological identification can be used as an indication of reliability of the overall results, and it can help in species identification of species complex, such as An.…”

Section: Discussionmentioning

confidence: 99%

Entomological characterization of malaria in northern Colombia through vector and parasite species identification, and analyses of spatial distribution and infection rates

González

Molina

León

et al. 2017

Malar J

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BackgroundMalaria remains a worldwide public health concern and, in Colombia, despite the efforts to stop malaria transmission, the incidence of cases has increased over the last few years. In this context, it is necessary to evaluate vector diversity, infection rates, and spatial distribution, to better understand disease transmission dynamics. This information may contribute to the planning and development of vector control strategies.ResultsA total of 778 Anopheles mosquitoes were collected in fifteen localities of Córdoba from August 2015 to October 2016. Six species were identified and overall, Anopheles albimanus was the most widespread and abundant species (83%). Other species of the Nyssorhynchus subgenus were collected, including Anopheles triannulatus (13%), Anopheles nuneztovari (1%), Anopheles argyritarsis (< 1%) and two species belonging to the Anopheles subgenus: Anopheles pseudopunctipennis (3%) and Anopheles neomaculipalpus (< 1%). Four species were found naturally infected with two Plasmodium species: Anopheles nuneztovari was detected naturally infected with Plasmodium falciparum and Anopheles pseudopunctipennis with Plasmodium vivax, whereas An. albimanus and An. triannulatus were found infected with both parasite species and confirmed by nested PCR.ConclusionsIn general, the obtained results were contrasting with previous studies in terms of the most abundant and widespread collected species, and regarding infection rates, which were higher than those previously reported. A positive relationship between mosquito local abundance at the locality level and human infection at the municipality level was found. Mosquito local abundance and the number of houses with mosquitoes in each village are factors explaining malaria human cases in these villages. The obtained results suggest that other factors related to the apparent variation in malaria eco-epidemiology in northern Colombia, must be identified, to provide health authorities with better decision tools aiming to design control and prevention strategies.Electronic supplementary materialThe online version of this article (doi:10.1186/s12936-017-2076-5) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Entomological characterization of malaria in northern Colombia through vector and parasite species identification, and analyses of spatial distribution and infection rates

González

Molina

León

et al. 2017

Malar J

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“…Although the vectorial potential of these species is probably lower than that of An. darlingi ,18 these findings support an urgent need to better understand how these mosquito-related changes affect malaria transmission.…”

Section: Plasmodium Vivax Epidemiologymentioning

confidence: 76%

Plasmodium vivax Landscape in Brazil: Scenario and Challenges

Siqueira¹,

Mesones-Lapouble²,

Marchesini³

et al. 2016

Am J Trop Med Hyg

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Brazil is the largest country of Latin America, with a considerable portion of its territoritory within the malaria-endemic Amazon region in the North. Furthermore, a considerable portion of its territory is located within the Amazon region in the north. As a result, Brazil has reported half of the total malaria cases in the Americas in the last four decades. Recent progress in malaria control has been accompanied by an increasing proportion of Plasmodium vivax, underscoring a need for a better understanding of management and control of this species and associated challenges. Among these challenges, the contribution of vivax malaria relapses, earlier production of gametocytes (compared with Plasmodium falciparum), inexistent methods to diagnose hypnozoite carriers, and decreasing efficacy of available antimalarials need to be addressed. Innovative tools, strategies, and technologies are needed to achieve further progress toward sustainable malaria elimination. Further difficulties also arise from dealing with the inherent socioeconomic and environmental particularities of the Amazon region and its dynamic changes.

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“…constitutes a unique species in Colombia [37–40], which corresponds to An. nuneztovari s.s. [41]. In this study, although molecular determinations were not performed, we suppose that An.…”

Section: Discussionmentioning

confidence: 93%

Insecticide Resistance and Its Intensity in Populations of Malaria Vectors in Colombia

Orjuela

Morales

Ahumada

et al. 2018

BioMed Research International

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Insecticide resistance in malaria vectors threatens malaria prevention and control efforts. In Colombia the three primary vectors, Anopheles darlingi, An. nuneztovari s.l., and An. albimanus, have reported insecticide resistance to pyrethroids, organophosphates, carbamates, and DDT; however, the insecticide resistance monitoring is not continuous, and the data on the prevalence of resistance is scarce and geographically limited. We describe the resistance levels and intensity of previously detected resistant populations among primary malaria vectors from the most endemic malaria areas in Colombia. The study was carried out in 10 localities of five states in Colombia. Bioassays were carried out following the methodology of CDC Bottle Bioassay using the discriminating concentration and in order to quantify the intensity the specimens were exposed to 2, 5, and 10X discriminating concentrations. Five insecticides were tested: deltamethrin, lambda-cyhalothrin, alpha-cypermethrin, permethrin, and DDT. The results provide evidence of low resistance intensity and resistance highly localized to pyrethroids and DDT in key malaria vectors in Colombia. This may not pose a threat to malaria control yet but frequent monitoring is needed to follow the evolution of insecticide resistance.

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Evidence of new species for malaria vector Anopheles nuneztovari sensu lato in the Brazilian Amazon region

Cited by 28 publications

References 54 publications

Entomological characterization of malaria in northern Colombia through vector and parasite species identification, and analyses of spatial distribution and infection rates

Entomological characterization of malaria in northern Colombia through vector and parasite species identification, and analyses of spatial distribution and infection rates

Plasmodium vivax Landscape in Brazil: Scenario and Challenges

Insecticide Resistance and Its Intensity in Populations of Malaria Vectors in Colombia

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