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de Almeida P.S.,Laboratorio Regional Of Entomologia | do Nascimento J.C.,Laboratorio Regional Of Entomologia | Ferreira A.D.,Laboratorio Regional Of Entomologia | Minzao L.D.,Laboratorio Regional Of Entomologia | And 3 more authors.
Revista Brasileira de Entomologia | Year: 2010

The phlebotomine sand flies are the natural vectors of some etiological agents of human and animal diseases, such as the protozoa of the genus Leishmania Ross, 1903. The phlebotomine fauna in Mato Grosso do Sul is relatively well known and so far consists of 54 species. The present study is based on the survey of the phlebotomine fauna of the urban area of the 18 municipal districts with transmission of visceral leishmaniasis, in the state of Mato Grosso do Sul, for the purpose of verifying the main species and providing data for the leishmaniasis control programmes. The collections were undertaken with automatic light traps, installed monthly on three consecutive nights, from 06:00 pm to 6:00 am over a two-year period. A total of 34,799 sand fly specimens, belonging to 36 species, were collected. Lutzomyia longipalpis (Lutz & Neiva, 1912) and Nyssomyia whitmani (Antunes, 1939) were the most widely dispersed species, the former was found in 16 and the latter in 15 out of the 18 municipalities investigated, however, Lu. longipalpis was predominant in all the municipalities and Ny. whitmani was not predominant in any of them. Corumbá contributed with 40.92% of the specimens and Lutzomyia cruzi (Mangabeira, 1938) with 92.50% of the specimens captured there. It is suggested that the species of Lutzomyia genus and Ny. whitmani may be involved in the transmission of leishmaniasis in Mato Grosso do Sul state.


de Almeida P.S.,Laboratorio Regional Of Entomologia | Leite J.A.,Laboratorio Regional Of Entomologia | de Araujo A.D.,Laboratorio Regional Of Entomologia | Batista P.M.,Laboratorio Regional Of Entomologia | And 7 more authors.
Revista Brasileira de Entomologia | Year: 2013

Fauna of phlebotomine sand flies (Diptera, Psychodidae) in areas with endemic American cutaneous leishmaniasis in the State of Mato Grosso do Sul, Brazil. The aim of this study was to investigate the ecological aspects of the main vectors of American cutaneous leishmaniasis (ACL) in four monitoring stations situated in the municipalities of Naviraí, Nova Andradina, Novo Horizonte do Sul and Rio Verde de Mato Grosso. For each monitoring station, the captures of sand flies were undertaken each month from July 2008 to June 2010 using CDC and Shannon traps. The CDC traps were installed simultaneously for three consecutive nights in three collection sites: intradomicile, peridomicile and edge of the forest. A Shannon trap was installed from dusk to 10 pm, inside the forest, one night per month. A total of 7,651 sand flies belonging to nine genera and twenty-nine species were captured. Nyssomyia neivai (52.95%), Psathyromyia hermanlenti (10.91%), Psathyromyia runoides (9.16%), Nyssomyia whitmani (7.95%), Psathyromyia aragaoi (4. 89%), Nyssomyia antunesi (3.14%) and Evandromyia bourrouli (2.20%) were the most frequent species. Approximately 65% of the sand flies were collected in the forest environment. The municipalities presented significantly different indexes of species diversity. Naviraí presented the lowest species diversity index, however, it showed the highest abundance. Novo Horizonte do Sul had the highest species diversity index, but the lowest abundance (< 5%). It is noteworthy the occurrence of vector species of Leishmania in the areas studied, especially in Naviraí, where Ny. neivai presented high frequencies which may explain the increased number of ACL cases in this municipality.


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.


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.


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.


de Almeida P.S.,Laboratorio Regional Of Entomologia | Minzao E.R.,Laboratorio Regional Of Entomologia | Minzao L.D.,Laboratorio Regional Of Entomologia | da Silva S.R.,Laboratorio Regional Of Entomologia | And 3 more authors.
Revista da Sociedade Brasileira de Medicina Tropical | Year: 2010

Introduction: The aim of this study was to carry out an analysis of urban phlebotomine fauna and a survey of infestations (intradomiciliary and peridomiciliary) in Ponta Porã municipality State of Mato Grosso do Sul. Methods: Sand flies were collected with automatic CDC light traps, installed monthly on three consecutive nights, from 18h to 6h, from September 2005 to September 2007. Results: A total of 3,946 phlebotomines, representing eight species, were captured, among which was a large predominance of Lutzomyia longipalpis, presenting high indexes of frequency, constancy, abundance and dominance. Of the total, 82.9% were males and 17.1% females. The monthly average number (136.29 ± 152.01) of males captured being, much larger than that of females. Although the average number of phlebotomines in the intradomicile was much larger than that in the peridomicile, there was no significant statistical difference. A positive correlation was found between the abundance of phlebotomines and the average daily maximum temperature, precipitation and relative atmospheric humidity. Conclusions: The predominance of Lutzomyia longipalpis in Ponta Porã municipality is a reason for concern as regards the possibility of outbreaks of visceral leishmaniasis in the area, because this species is the main Leishmania chagasi vector not only in Mato Grosso do Sul but also nationwide.


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.


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.


PubMed | Laboratorio Regional Of Entomologia, Instituto Rene Rachou and Federal University of Mato Grosso do Sul
Type: | Journal: Parasites & vectors | Year: 2015

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.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.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.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.


Cominetti M.C.,Federal University of Mato Grosso do Sul | De Almeida R.F.C.,Federal University of Mato Grosso do Sul | Do Amoral Goncalves G.M.,Laboratorio Regional Of Entomologia | Andreotti R.,EMBRAPA - Empresa Brasileira de Pesquisa Agropecuária
Revista da Sociedade Brasileira de Medicina Tropical | Year: 2013

Introduction: The aim of the present study was to assess the polymerase chain reaction (PCR) as a method for detecting Trypanosoma cruzi infection in triatomines that had been previously determined by microscopic examination in the State of Mato Grosso do Sul, Brazil. Methods: In total, 515 specimens were collected. Material from the digestive tract of each triatomine was analyzed for the presence of T. cruzi by microscopic examination and PCR using the 121/122 primer set. Results: Among the 515 specimens tested, 58 (11.3%) were positive by microscopy and 101 (19.61%) were positive by PCR and there was an association between the results of the techniques (X2 = 53.354, p = 0.001). The main species of triatomine identified was T. sordida (95.5%) Conclusions: The use of PCR in entomological surveillance may contribute to a better assessment of the occurrence of T. cruzi in triatomine populations.

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