Evidence map›Paper›PMID 29145867›Full record

ArticleParasites & vectors2017

Environmental variables associated with anopheline larvae distribution and abundance in Yanomami villages within unaltered areas of the Brazilian Amazon.

Jordi Sánchez-Ribas, Joseli Oliveira-Ferreira, John E Gimnig, Cleomar Pereira-Ribeiro, Maycon Sebastião Alberto Santos-Neves, Teresa Fernandes Silva-do-Nascimento

Open access · goldAbstract read
In one paragraph

Article in Parasites & vectors, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
1.7field-weighted citation impact, top 14% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

14 citing papers in PubMed, 29 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 2 countries.

Jordi Sánchez-RibasLaboratório de Imunoparasitologia, Instituto Oswaldo Cruz-FIOCRUZ, Rio de Janeiro, Brazil.
Joseli Oliveira-FerreiraLaboratório de Imunoparasitologia, Instituto Oswaldo Cruz-FIOCRUZ, Rio de Janeiro, Brazil.
John E GimnigCenter for Disease Control and Prevention, CDC, Atlanta, USA.
Cleomar Pereira-RibeiroDistrito Sanitário Especial Indígena Yanomami, DSEI-Y, Boa Vista, Brazil.
Maycon Sebastião Alberto Santos-NevesLaboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz-FIOCRUZ, Rio de Janeiro, Brazil.
Teresa Fernandes Silva-do-NascimentoLaboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz-FIOCRUZ, Rio de Janeiro, Brazil. teresa.karti@gmail.com.
Fundação Oswaldo Cruz · BRCenters for Disease Control and Prevention · US

Funding

Conselho Nacional de Desenvolvimento Científico e Tecnológico 479559/2013-9Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro E-26/110.803
6 · The paper itself

Abstract

backgroundMany indigenous villages in the Amazon basin still suffer from a high malaria burden. Despite this health situation, there are few studies on the bionomics of anopheline larvae in such areas. This publication aims to identify the main larval habitats of the most abundant anopheline species and to assess their associations with some environmental factors.

methodsWe conducted a 19-month longitudinal study from January 2013 to July 2014, sampling anopheline larvae in two indigenous Yanomami communities, comprised of four villages each. All natural larval habitats were surveyed every two months with a 350 ml manual dipper, following a standardized larval sampling methodology. In a third study area, we conducted two field expeditions in 2013 followed by four systematic collections during the long dry season of 2014-2015.

resultsWe identified 177 larval habitats in the three study areas, from which 9122 larvae belonging to 13 species were collected. Although species abundance differed between villages, An. oswaldoi (s.l.) was overall the most abundant species. Anopheles darlingi, An. oswaldoi (s.l.), An. triannulatus (s.s.) and An. mattogrossensis were primarily found in larval habitats that were partially or mostly sun-exposed. In contrast, An. costai-like and An. guarao-like mosquitoes were found in more shaded aquatic habitats. Anopheles darlingi was significantly associated with proximity to human habitations and larval habitats associated with river flood pulses and clear water.

conclusionsThis study of anopheline larvae in the Brazilian Yanomami area detected high heterogeneities at micro-scale levels regarding species occurrence and densities. Sun exposure was a major modulator of anopheline occurrence, particularly for An. darlingi. Lakes associated with the rivers, and particularly oxbow lakes, were the main larval habitats for An. darlingi and other secondary malaria vectors. The results of this study will serve as a basis to plan larval source management activities in remote indigenous communities of the Amazon, particularly for those located within low-order river-floodplain systems.

Indexed as

Animal DistributionEcological and Environmental PhenomenaEcosystemAnimalsAnophelesBrazilHumansLakesLarvaLongitudinal StudiesMalariaMosquito VectorsRiversSeasonsAn. darlingiAnopheline larvaeEnvironmental driversSun exposureYanomami

Identifiers

PMID29145867
PMCPMC5691859
OpenAlexW2770063106

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.