Triatomíneos rupestres infectados por Trypanosomatidae, coletados em Quaraí, Rio Grande do Sul, 2003

Martins, Luciamáre Perinetti Alves; Castanho, Roberto Esteves Pires; Casanova, Cláudio; Caravelas, David Tibiriçá; Frias, Guilherme Tardim; Ruas-Neto, Antônio Leite; Rosa, João Aristeu da

doi:10.1590/s0037-86822006000200013

Cited by 14 publications

(14 citation statements)

References 7 publications

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“…We emphasize that T. rubrovaria presents bionomic characteristics of a good vector of T. cruzi (Almeida et al 2000(Almeida et al , 2002a(Almeida et al ,b, 2003(Almeida et al , 2005 and can maintain high rates (25%) of natural infection by that parasite (Martins et al 2003(Martins et al , 2008. According to Jurberg et al (1998), T. carcavalloi can also invade human domiciles.…”

Section: Discussionmentioning

confidence: 88%

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Phylogenetic and Phenotypic Relationships AmongTriatoma carcavalloi(Hemiptera: Reduviidae: Triatominae) and Related Species Collected in Domiciles in Rio Grande do Sul State, Brazil

Almeida¹,

Marcet²,

Gumiel³

et al. 2009

Journal of Vector Ecology

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Triatoma carcavalloi is considered a rare Chagas disease vector often collected inside domiciles in Rio Grande do Sul State. In this Brazilian state, T. carcavalloi has been collected in the same ecotope (rock piles) with two other species (T. rubrovaria and T. circummaculata), with which it also shares morphological characteristics. Previous morphological studies placed T. carcavalloi in the same species complex ("infestans complex") and subcomplex ("rubrovaria subcomplex") as T. rubrovaria, whereas T. circummaculata was placed in the "circummaculata complex. " The phylogeny of a group composed of 16 species of triatomines was revaluated with the inclusion of T. carcavalloi by Bayesian analysis using mtDNA sequences of subunits 12S and 16S of the ribosomal RNA, and the cytochrome oxidase I (COI) genes. The phenotypic relationship among T. carcavalloi and related triatomines was also inferred from morphometrics. Phylogenetic results indicate that T. carcavalloi is a sister species of T. rubrovaria, and both were recovered as closely related to T. circummaculata. Morphometric studies confirmed the closeness among T. carcavalloi, T. rubrovaria, and T. circummaculata, prompting the placement of the latter species in the "infestans complex" and "rubrovaria subcomplex. " Journal of Vector Ecology 34 (2): 164-173. 2009.

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Section: Discussionmentioning

confidence: 88%

“…Almeida et al (2002a) observed that three triatomine species (T. carcavalloi, T. rubrovaria, and T. circummaculata; Figure 1) occur in sympatry in the same ecotope (rock piles) in RGS. All of them have also been found inside domiciles in this state (Martins et al 2003, Jurberg et al 1998). Jurberg et al (1998) …”

Section: Introductionmentioning

confidence: 82%

Phylogenetic and Phenotypic Relationships AmongTriatoma carcavalloi(Hemiptera: Reduviidae: Triatominae) and Related Species Collected in Domiciles in Rio Grande do Sul State, Brazil

Almeida¹,

Marcet²,

Gumiel³

et al. 2009

Journal of Vector Ecology

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“…Studies carried out in many different regions of Brazil have shown high triatomine infestation on palms, chiefly by bugs of the genus Rhodnius spp. 9,19,20 .…”

Section: Discussionmentioning

confidence: 99%

Study on Chagas disease occurrence in the municipality of Monte Negro, State of Rondônia, Brazilian Amazon

Carvalho

Rosa

Carvalho

et al. 2011

Rev. Soc. Bras. Med. Trop.

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Introduction: Studies on Chagas disease deal with the perspective of its occurrence in the Amazon region, which is directly correlated to the population growth and the spread of the bug biotope. The state of Rondônia has an immense source of vectors (Triatomine) and reservoirs of Trypanosoma cruzi. Environmental changes brought forth by the deforestation in the region may cause vector behavior changes and bring these vectors to a closer contact with humans, increasing the probability of vector infection. Methods: This study was carried out to check the occurrence of Chagas disease in the municipality of Monte Negro, Rondônia, Brazil, based on a random sampling of the farms and people wherein blood collection from the population and capturing triatomines were done. The blood samples were submitted to serologic tests to detect antibodies of the IgG class against T. cruzi. The triatomines that were collected had their digestive tract checked for the presence of trypanosomatidae with morphology resembling that of the T. cruzi. Results: The population examined was mostly from other states. From the 322 bugs examined on the microscope, 50% showed parasites with morphology compatible with T. cruzi. From the serology of 344 random samples of human blood, 1.2% was found positive, 6% showed inconclusive results, and 92.8% were negative. Conclusions: Monte Negro shows low prevalence of human infection by T. cruzi and none active vector transmission; however, preventive and surveying measures, which are not performed until now, shall be taken due to the abundance of vectors infected by trypanosomatidae. Keywords: Chagas disease. Amazon. Trypanosoma cruzi. Triatomines. RESUMO Introdução:Estudos anteriores sobre doença de Chagas tratam da perspectiva da ocorrência endêmica da parasitose na região Amazônica, que se correlaciona diretamente com o aumento populacional e a invasão do ecótopo pelos triatomíneos. O Estado de Rondônia possui um imenso manancial de vetores e reservatórios de Trypanosoma cruzi. As modificações ambientais ocasionadas pelo desmatamento na região podem gerar mudanças nos hábitos dos vetores, trazendo-os para um contato mais próximo do homem, aumentando as possibilidades de infecção vetorial. Métodos: Este estudo foi realizado para verificar a ocorrência da doença de Chagas em Monte Negro, Rondônia, equivalente à amostragem aleatória das propriedades rurais e de pessoas residentes no município, onde foram realizadas coletas sanguíneas dos moradores e coleta de triatomíneos. As amostras sanguíneas foram submetidas a testes sorológicos para detecção de anticorpos da classe IgG contra T. cruzi e os triatomíneos coletados foram analisados para verificar a presença de tripanosomatídeos em seu trato digestivo. Resultados: A população estudada, randomicamente selecionada, é em sua maioria advinda de outros estados. Dos 322 barbeiros avaliados microscopicamente, 50% apresentavam flagelados com morfologia compatível com Trypanosoma cruzi. A sorologia das 344 amostras de sangue humano coletadas randomicame...

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“…Field data have shown that T. rubrovaria is frequently found in domiciliary and peridomiciliary areas 3 . Only T. carcavalloi has been observed in Canguçu, Dom Feliciano, Pinheiro Machado and São Jerônimo 4 (Source: IPB-LACEN/RS), appearing inside domiciles throughout Rio Grande do Sul 5,6 .…”

Section: Introductionmentioning

confidence: 99%

Biology of Triatoma carcavalloi Jurberg, Rocha & Lent, 1998 under laboratory conditions

Cardozo-de-Almeida

Neves

Almeida

et al. 2014

Rev. Soc. Bras. Med. Trop.

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Introduction:Triatoma carcavalloi is a wild species that is found in sympatry with Triatoma rubrovaria and Triatoma circummaculata, which are vectors of Trypanosoma cruzi currently found in rural areas of Rio Grande do Sul, Brazil. Methods: Fertility was assessed and to determine the incubation period, the eggs were observed until hatching. The first meal was offered to 1 st stage nymphs. The intermolt period was also determined. The number of blood meals was quantified at each nymphal stage and the resistance to fasting as the period between ecdysis and death. Mortality was assessed and longevity was determined by recording the time that elapsed from molting to the adult stage and until death. The developmental cycle was assessed by recording the length in days of each stage from molting to adult hood. Results: The average incubation period was 22.7 days. The average first meal occurred 3.1 days after hatching. The 5 th stage nymph to adult intermolting period was the longest at 193.4 days. The average number of feedings during nymphal development was 13.4. The resistance to fasting assay indicated that the 3 rd , 4 th and 5 th stage nymphs presented higher resistance than did adults. The highest mortality rate was observed in the 3 rd stage nymphs (22.2%). The average length of adult survival was 25.6 weeks, and the average total life cycle lasted 503.4 days. Conclusions:This study is the first report on the biology of T. carcavalloi that fed on mice. The presented findings expand the bionomic knowledge of these species.

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Triatomíneos rupestres infectados por Trypanosomatidae, coletados em Quaraí, Rio Grande do Sul, 2003

Cited by 14 publications

References 7 publications

Phylogenetic and Phenotypic Relationships AmongTriatoma carcavalloi(Hemiptera: Reduviidae: Triatominae) and Related Species Collected in Domiciles in Rio Grande do Sul State, Brazil

Phylogenetic and Phenotypic Relationships AmongTriatoma carcavalloi(Hemiptera: Reduviidae: Triatominae) and Related Species Collected in Domiciles in Rio Grande do Sul State, Brazil

Study on Chagas disease occurrence in the municipality of Monte Negro, State of Rondônia, Brazilian Amazon

Biology of Triatoma carcavalloi Jurberg, Rocha & Lent, 1998 under laboratory conditions

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