Distribuição geográfica e indicadores entomológicos de triatomíneos sinantrópicos capturados no Estado de Goiás

Oliveira, Antônio Wilson Soares de; Silva, Ionizete Garcia da

doi:10.1590/s0037-86822007000200011

Cited by 42 publications

(57 citation statements)

References 8 publications

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Section: Discussionmentioning

confidence: 99%

“…The species with highest natural infection rate with trypanosomes was P. megistus, as observed in our study in DF. Between 2000 and 2003 four more species were reported in the State of Goiás: P. diasi, T. costalimai, P. geniculatus, and T. lenti 18 . As DF is geographically placed inside the State of Goiás, T. costalimai and T. lenti may also occur in wild environments in DF.…”

Section: Discussionmentioning

confidence: 99%

“…Regardless of the fact that it has remained the most collected species in cerrado areas of Brazil for the past years 18,[45][46][47] , T. sordida presents a low risk of transmission of T. cruzi to humans because of its peridomiciliary behavior and marked ornithophily 15,34,[46][47] . Some studies show that zones of higher occurrence of T. sordida correspond to those of higher and older farm exploration 33 , which may justify the higher frequency of this species in Planaltina.…”

Section: Discussionmentioning

confidence: 99%

“…In the wild environment P. geniculatus inhabits, preferentially, armadillo burrows (Dasypus spp.) 26,27 , but it has been found in the domiciliary environment in different states of Brazil 18,[54][55] .Punctual distributions of P. diasi in DF were also observed. This species is distributed in areas of cerrado in central Brazil 18,56 and has been found in the domiciliary environment without description of wild ecotopes 26 .…”

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confidence: 98%

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Occurrence of synanthropic triatomines (Hemiptera: Reduviidae) in the Federal District of Brazil

Maeda

Knox

Gurgel-Gonçalves

2012

Rev. Soc. Bras. Med. Trop.

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This retrospective analysis considered the number of adults and nymphs of each species collected and infected in both intradomicile and peridomicile. Results: A total of 754 triatomines were collected in 252 reported domiciles. Panstrongylus megistus was the most frequent species (65%), followed by T. pseudomaculata (14%). Of the 309 examined insects, only 3 (1%) specimens of P. megistus were infected with flagellates morphologically similar to Trypanosoma cruzi. The spatial occurrence indicated a higher diversity of triatomines and frequency of T. sordida in rural areas. Moreover, there was a predominance of P. megistus in urban areas. The number of records of P. megistus in the rainy season was two times higher than that during the dry season. The largest number of triatomines was collected in November. Conclusions: The presence of P. megistus specimens infected with trypanosomes in domiciles, shows the potential risk of human infection in DF. Thus, it is essential to continue entomological surveillance, intensifying it in the rainy season and in regions of greater occurrence. Keywords: Chagas disease control. Entomological surveillance. Synanthropic triatomines. Federal District. Brazil. triatomines. Furthermore, the invasion and/or colonization of infected triatomines from wild ecotopes may represent the risk of vectorial transmission with the installation of peridomiciliary and domiciliary cycles of T. cruzi 6,7 . In this context, the objective of this paper is to analyze the spatial and temporal occurrence of triatomine species collected in DF, as well as their indices of natural infection with trypanosomes to direct actions of entomological surveillance of Chagas disease coordinated by SES-DF. RESUMO 72 METHODS RESULTS Maeda MH et al -Occurrence of triatomines in DF Study areaThe Federal District of Brazil is geographically located between the parallels 15º30' and 16º03' south latitude, and between meridians 47°25' and 48°12' west longitude, in Central Brazil, one of the highest areas of the region, the Central Plateau. According to 2010 Census results, the population comprises 2,563,963 people in an area of 5,787,784km 2 divided into 30 administrative regions 8 . The area is filled with plateaus over 1,000m in altitude. The average annual rainfall is around 1,600mm, and the average annual temperature ranges between 18°C and 20°C with two distinct seasons, the dry season from May to September and the rainy season from October to April, the latter season with the highest temperature records 9 . Triatomine collection and natural infectionThe insects were collected in intradomiciliary and peridomiciliary environments by residents and then taken to the PITs. Each PIT receives a kit with materials for insect storage, a notepad to keep notes containing the address and location of collection, and tweezers for the handling of specimens.After notification, the SES-DF public health agents did active searches in these houses and their annexes. The materials used for triatomine collection were metal tweezers and fl...

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 98%

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Occurrence of synanthropic triatomines (Hemiptera: Reduviidae) in the Federal District of Brazil

Maeda

Knox

Gurgel-Gonçalves

2012

Rev. Soc. Bras. Med. Trop.

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“…R. neglectus é uma espécie característica do cerrado no Brasil central com um papel importante na transmissão enzoótica de Trypanosoma cruzi e T. rangeli 6 . Além da invasão de adultos nos domicílios 7 , existem evidências de formação de colônias domiciliares de R. neglectus nos Estados de Minas Gerais, São Paulo e Goiás [8][9][10] , sendo considerado como um vetor secundário na transmissão da doença de Chagas. R. robustus (s.l., ver Abad-Franch cols 4 ) tem ampla distribuição na Amazônia, ocorrendo frequentemente em palmeiras (silvestres e periurbanas) em altas densidades e com relevantes taxas de infecção por tripanosomatídeos 1,3,11,12 .…”

Section: Rhodnius Neglectusunclassified

Biologia comparativa e comportamento alimentar de Rhodnius neglectus e Rhodnius robustus (Triatominae) sob condições de laboratório

Barreto-Santana

Starling

Gurgel-Gonçalves

et al. 2011

Rev. Soc. Bras. Med. Trop.

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RESUMOIntrodução: A competência vetorial de triatomíneos é determinada a partir de estudos sobre biologia e comportamento alimentar em condições de campo e/ou laboratório. Fatores como número de picadas, quantidade de sangue ingerido e tempo de defecação têm implicações na transmissão de tripanosomatídeos. Parâmetros biológicos e comportamentais de Rhodnius neglectus e R. robustus foram comparados experimentalmente para estimar diferenças no potencial de transmissão de tripanosomatídeos. Métodos: Os triatomíneos foram observados diariamente para determinar o período de desenvolvimento ninfal, mortalidade, detecção da fonte alimentar, número de picadas, tempo do repasto sanguíneo, quantidade de sangue ingerido, tempo entre o final do repasto e a primeira defecação e frequência de defecação. Resultados: Apesar do período ninfal de R. neglectus (156,4 ± 25,05d) ter sido menor que o de R. robustus (204,7 ± 13,22d), a mortalidade foi similar entre as espécies (63,8 e 65%, respectivamente). R. robustus e R. neglectus detectaram rapidamente a fonte alimentar, especialmente no primeiro estádio (2,5 e 1,6min, respectivamente). Apesar do tempo de repasto sanguíneo ter sido similar entre as espécies, R. robustus ingeriu em média uma maior quantidade de sangue em todos os estádios, com maiores valores para as ninfas V. As ninfas de R. neglectus picaram mais vezes as fontes alimentares, defecaram mais rápido e mais frequentemente que as de R. robustus. Conclusões: Sob as condições de laboratório usadas, R. neglectus possui um maior potencial para transmissão de Trypanosoma cruzi e T. rangeli que R. robustus, atributo que deve ser avaliado em infecções experimentais. Palavras-chaves: Triatominae. Rhodnius. Biologia. Competência vetorial. Tripanosomatídeos. ABSTRACT Introduction:The vector competence of triatomine insects is determined by studying their biology and feeding behavior under field and/or laboratory conditions. Factors including the number of bites, the amount of blood ingested and defecation time have implications for trypanosome transmission. The biological and behavioral parameters of Rhodnius neglectus and R. robustus were compared under experimental conditions to estimate differences in the potential transmission of trypanosomes. Methods: The insects were observed daily to determine the period of nymphal development, mortality, detection of food source, number of bites, time of blood meal intake, amount of blood ingested, time elapsed between the end of the meal and the first defecation and the frequency of defecation. Results: Although the nymphal development of R. neglectus (156.4 ± 25.05d) was lower than that of R. robustus (204.7 ± 13.22d), the mortality between species was similar (63.8 and 65% respectively). R. robustus and R. neglectus quickly located the food source, especially in the first instar (2.5 and 1.6 min, respectively). Although the time of blood meal intake was similar between the species, R. robustus ingested a larger amount of blood on average at all stages and exhibited higher values for ...

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Looks Can be Deceiving: Cryptic Species and Phenotypic Variation in Rhodnius spp., Chagas Disease Vectors

Pavan

Rivas

Gurgel-Gonçalves

2015

Evolutionary Biology: Biodiversification From Genotype to Phenotype

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Distribuição geográfica e indicadores entomológicos de triatomíneos sinantrópicos capturados no Estado de Goiás

Cited by 42 publications

References 8 publications

Occurrence of synanthropic triatomines (Hemiptera: Reduviidae) in the Federal District of Brazil

Occurrence of synanthropic triatomines (Hemiptera: Reduviidae) in the Federal District of Brazil

Biologia comparativa e comportamento alimentar de Rhodnius neglectus e Rhodnius robustus (Triatominae) sob condições de laboratório

Looks Can be Deceiving: Cryptic Species and Phenotypic Variation in Rhodnius spp., Chagas Disease Vectors

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