Structure of Anopheles (Diptera: Culicidae) population in areas with different degrees of human settlement: Cantá - Roraima - Brazil

Gomes, Elainne Christine de Souza; Albuquerque, Cleide Maria Ribeiro de; Souza, José Roberto Botêlho de; Arruda, Maria Augusta; Confalonieri, Ulisses

doi:10.1590/s0044-59672008000200016

Cited by 6 publications

(5 citation statements)

References 44 publications

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“…Reflections concerning the diversity of the mosquito Culicidae have been postulated, with implications in transmission patterns, especially in malaria 1 . Nevertheless, few studies have been conducted regarding the population dynamics of Anopheles in areas recently altered, thus explaining why it is difficult predict the circumstances of maintenance and increase in plasmodium transmission among humans 2 . The region where the study was developed has passed through an historic process of deforestation and development of cattle and diversified crops, existing among a vast complex of lakes.…”

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confidence: 99%

Effects of flooding of the River Paraná on the temporal activity of Anopheles (Nyssorhynchus) darlingi Root (Diptera: Culicidae), at the border state of Mato Grosso do Sul and São Paulo, Brazil

Gomes

Paula

Natal

et al. 2010

Rev. Soc. Bras. Med. Trop.

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INTRODUCTION: Study of the temporal activity of malaria vectors during the implantation of a hydroelectric power station on the River Paraná, intended to generate electrical energy. The river separates the States of São Paulo and Mato Grosso do Sul, in Brazil. The objective was to verify whether alterations occurred in the wealth and diversity indices of Anopheles, following two successive floods, extended to the temporal activity and nycthemeral rhythm followed over a five year period. METHODS: Mosquito capture was performed monthly using the Human Attraction Technique and Shannon Traps. The first, executed for 24h, provided the nycthemeral rhythm and the second, lasting 15h, permitted the tracking of Anopheles during the two floods. RESULTS: The bimodal pattern of Anopheles darlingi defined before these floods was modified throughout the environment interventions. The same effect had repercussions on the populations of An albitarsis s.l., An triannulatus and An galvaoi. Activity prior to twilight was less affected by the environment alterations. CONCLUSIONS: The dam construction provoked changes in Anopheles temporal activity patterns, permitting classification of the area as an ecologically steady and unstable situation. Differences observed in Anopheles behavior due to the capture methods revealed the influence of solo and multiple attractiveness inside the populations studied.

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confidence: 99%

Effects of flooding of the River Paraná on the temporal activity of Anopheles (Nyssorhynchus) darlingi Root (Diptera: Culicidae), at the border state of Mato Grosso do Sul and São Paulo, Brazil

Gomes

Paula

Natal

et al. 2010

Rev. Soc. Bras. Med. Trop.

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“…Although it exhibits exophilic and zoophilic behavior, this species is considered a secondary or potential vector of human malaria (Consoli and Lourenc¸o de Oliveira 1994). The relationship between anophelines and the presence of favorable man-made habitats can be considered to contribute to the maintenance of the population of these species in the parks (Gomes et al 2008). However, because of their low frequency, the risk of these anophelines acting as vectors of Plasmodium spp.…”

Section: Discussionmentioning

confidence: 99%

Mosquito (Diptera: Culicidae) fauna in parks in greater São Paulo, Brazil

et al. 2015

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Municipal parks in the city of Sã o Paulo, which are used for leisure purposes, contain remnants of the flora of the Atlantic Forest, as well as lakes and springs, and are home to mammals, birds and arthropods, some of which can be vectors of disease. The eastern side of the city has the largest population in Sã o Paulo and twenty-four municipal parks. The aim of this study was to investigate Culicidae fauna in two parks on this side of the city and to determine which of the Culicidae species identified have the potential to act as bioindicators and vectors of human pathogens. Culicidae were collected monthly between March 2011 and February 2012 in Carmo Park and Chico Mendes Park with battery-powered aspirators, Shannon traps and CDC traps for adult mosquitoes, and larval dippers and suction samplers for immature mosquitoes. To confirm sample sufficiency, the EstimateS program was used to plot sample-based species accumulation curves and estimate total richness by the Jackknife 1 method. In all, 1,092 culicids from nine genera (Aedes, Anopheles, Coquillettidia, Culex, Limatus, Mansonia, Trichoprosopon, Toxorhynchites and Uranotaenia) and nineteen taxonomic units were collected in Carmo Park. Coquillettidia venezuelensis (Theobald 1912), Aedes scapularis (Rondani 1848) and Culex (Culex) spp. Linnaeus 1758 were the most abundant adults, and Culex (Melanoconion) spp. Theobald 1903 and Anopheles strodei Root 1926 the most abundant immature mosquitoes. In Chico Mendes Park 4,487 mosquitoes in six genera and eighteen taxonomic units were collected. Culex (Cux.) spp. and Ae. scapularis were the most abundant adults, and Ae. albopictus (Skuse 1984) the most abundant immature mosquitoes. The species accumulation curves in both parks were close to the asymptote, and the total richness estimate was close to the observed richness. Some culicid taxons are bioindicators of environmental conditions in the areas they inhabit. It is important to monitor native fauna in municipal parks in Sã o Paulo as various species in this study were found to have vector competence and capacity to transmit pathogens, such as arboviruses. Keywords: Diversity, culicids, mosquitoes, municipal parks.PAULA, M.B., FERNANDES, A., MEDEIROS-SOUSA, A.R., CERETTI-JUNIOR, W., CHRISTE, R.O., STROEBEL, R., PEDROSA, L., ALMEIDA, R., CARVALHO, G.C., PEREIRA, U., JACINTHO, M., NATAL, D., MARRELLI, M.T.

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“…Only a few field studies focused on the structure of anopheline populations in areas with different degrees of human activity in rural settlements in the Amazon 13 , 36 . However, it is a fact that Ny.…”

Section: Discussionmentioning

confidence: 99%

Description of malaria vectors (Diptera: Culicidae) in two agricultural settlements in the Western Brazilian Amazon

Andrade

Santos

Castro

et al. 2021

Rev. Inst. Med. trop. S. Paulo

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The majority of malaria cases in South America occur in rural areas of the Amazon region. Although these areas have a significant impact on malaria cases, few entomological studies have been carried out there. This study aimed to describe entomological parameters in settlements in Rondonia State, Brazil. Collections of anopheles were carried out using the Protected Human Attraction Technique (PHAT). The risk and the potential for malaria transmission were assessed using the human biting rate (HBR), the sporozoite rate (SR) and the entomological inoculation rate (EIR). The results confirmed that Nyssorhynchus darlingi is the predominant species in the two studied locations. Although settlement in the two study sites has occurred at different times, the species richness found was low, showing that environmental changes caused by anthropological actions have probably favor the adaptation of Ny. darlingi species. From the total of 615 anopheline mosquitoes assessed, seven (1.1%) were positive for Plasmodium sp. infections. The EIR revealed that Ny. darlingi contributes to malaria transmission in both locations, as it was responsible for 0.05 infectious bites in humans at night in the old settlement and 0.02 in the recent occupation. In the two study sites, the biting occurred more frequently at dusk. Nyssorhynchus darlingi was prevalent in areas of recent colonization but, even when present in a low density, this species could maintain the transmission of malaria in the older settlement. The entomological information obtained in this study is important and may aid the selection of vector control actions in these locations.

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Structure of Anopheles (Diptera: Culicidae) population in areas with different degrees of human settlement: Cantá - Roraima - Brazil

Cited by 6 publications

References 44 publications

Effects of flooding of the River Paraná on the temporal activity of Anopheles (Nyssorhynchus) darlingi Root (Diptera: Culicidae), at the border state of Mato Grosso do Sul and São Paulo, Brazil

Effects of flooding of the River Paraná on the temporal activity of Anopheles (Nyssorhynchus) darlingi Root (Diptera: Culicidae), at the border state of Mato Grosso do Sul and São Paulo, Brazil

Mosquito (Diptera: Culicidae) fauna in parks in greater São Paulo, Brazil

Description of malaria vectors (Diptera: Culicidae) in two agricultural settlements in the Western Brazilian Amazon

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