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de Almeida P.S.,Federal University of Grande Dourados | de Almeida P.S.,Laboratorio Regional Of Entomologia | de Andrade A.J.,University of Brasilia | Sciamarelli A.,Federal University of Grande Dourados | And 5 more authors.
Memorias do Instituto Oswaldo Cruz | Year: 2015

This study updates the geographic distributions of phlebotomine species in Central-West Brazil and analyses the climatic factors associated with their occurrence. The data were obtained from the entomology services of the state departments of health in Central-West Brazil, scientific collections and a literature review of articles from 1962- 2014. Ecological niche models were produced for sandfly species with more than 20 occurrences using the Maxent algorithm and eight climate variables. In all, 2,803 phlebotomine records for 127 species were analysed. Nyssomyia whitmani, Evandromyia lenti and Lutzomyia longipalpis were the species with the greatest number of records and were present in all the biomes in Central-West Brazil. The models, which were produced for 34 species, indicated that the Cerrado areas in the central and western regions of Central-West Brazil were climatically more suitable to sandflies. The variables with the greatest influence on the models were the temperature in the coldest months and the temperature seasonality. The results show that phlebotomine species in Central-West Brazil have different geographical distribution patterns and that climate conditions in essentially the entire region favour the occurrence of at least one Leishmania vector species, highlighting the need to maintain or intensify vector control and surveillance strategies. © 2015 Fundacao Oswaldo Cruz. All rights reserved. Source

Flechtmann C.H.W.,University of Sao Paulo | Peralta-Alba L.E.,Laboratorio Regional Of Entomologia
Systematic and Applied Acarology | Year: 2012

Schizotetranychus tegophallos sp.nov., from papyrus sedge (Cyperus involucratus Rottb., Cyperaceae) from Santiago, Chile, is described and figured. The genital stylets of the male, palpal tarsus tactile setae and chaetotaxy of leg IV trochanter in deutonymphs are discussed. © 2012 Systematic & Applied Acarology Society. Source

De Oliveira A.G.,Federal University of Mato Grosso do Sul | Sanguinette C.D.C.,Instituto Rene Rachou | De Almeida P.S.,Laboratorio Regional Of Entomologia | Andrade Filho J.D.,Instituto Rene Rachou
Parasites and Vectors | Year: 2015

Background: The genus Evandromyia is widely found in Brazil, but occurs mainly in Brazilian savannah. To date 13 species have been described in the subgenus Aldamyia. Here we described a new species of Evandromyia (Aldamyia) collected in the State of Mato Grosso do Sul, Brazil. Methods: Measurements were made using a micrometer eyepiece on an Olympus CH-2 binocular microscope and drawings were executed with the aid of a camera lucida. Results: The new species, Evandromyia orcyi sp. nov., is closely related to Evandromyia lenti, Evandromyia carmelinoi and Evandromyia evandroi, however, characteristics of the male terminalia and female spermathecae distinguish it from other species of the genus Evandromyia. Conclusion: With the description of Evandromyia orcyi sp. nov., six species of the subgenus Aldamyia have been reported from the State of Mato Grosso do Sul. © 2015 de Oliveira et al.; licensee BioMed Central. Source

Obara M.T.,Laboratorio Of Entomologia Medica | Otrera V.C.G.,Laboratorio Do Nucleo Of Pesquisa | Goncalves R.G.,University of Brasilia | dos Santos J.P.,Nucleo de Geoprocessamento | And 4 more authors.
Revista da Sociedade Brasileira de Medicina Tropical | Year: 2011

Introduction: Triatoma sordida Stål, 1859 populations were investigated for susceptibility to deltamethrin. Methods: This study aimed to analyze the resistance of 11 populations of insects from the States of Goiás, Mato Grosso and Mato Grosso do Sul by topical application bioassays. Results: The estimated LD50 and RR50 showed high levels of susceptibility (LD50 < 1 and RR50 < 2). However, analysis of the slope of the dose response curve showed that the populations of insects in the towns of Firminópolis/GO, Posse/GO, Poxoréu/MT, Douradina/MS and Aparecida do Taboado/MS present great probability of evolving resistance and, thus, are more likely to tolerate treatment with deltamethrin. Conclusions: Small changes in susceptibility and low levels of resistance were detected, but the temporal changes of susceptibility should be continuously monitored to adequately guide the actions of vector-control of DC. Source

Pereira J.M.,University of Brasilia | Pereira J.M.,Coordenacao Geral Of Laboratorios Of Saude Publica | de Almeida P.S.,Laboratorio Regional Of Entomologia | de Sousa A.V.,Nucleo de Apoio ao Controle de Endemias | And 3 more authors.
Memorias do Instituto Oswaldo Cruz | Year: 2013

We estimated the geographic distributions of triatomine species in Central-West Region of Brazil (CW) and analysed the climatic factors influencing their occurrence. A total of 3,396 records of 27 triatomine species were analysed. Using the maximum entropy method, ecological niche models were produced for eight species occurring in at least 20 municipalities based on 13 climatic variables and elevation. Triatoma sordida and Rhodnius neglectus were the species with the broadest geographic distributions in CW Brazil. The Cerrado areas in the state of Goiás were found to be more suitable for the occurrence of synanthropic triatomines than the Amazon forest areas in the northern part of the state of Mato Grosso. The variable that best explains the evaluated models is temperature seasonality. The results indicate that almost the entire region presents climatic conditions that are appropriate for at least one triatomine species. Therefore, it is recommended that entomological surveillance be reinforced in CW Brazil. Source

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