Entoepidemiology of Chagas disease in northwest São Paulo and cytogenetic analysis of its main vector, Triatoma sordida (Hemiptera: Triatominae)

Silistino-Souza, Rosana; Alevi, Kaio Cesar Chaboli; Castro, N. F. C.; Freitas, Maria Nazaré Oliveira; Papa, Michèle; Scandar, Sirle Abdo Salloun; Bestetti, R. R.; Rosa, João Aristeu da; Azeredo-Oliveira, Maria Tercília Vilela de

doi:10.4238/2013.november.22.8

Cited by 4 publications

(6 citation statements)

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“…The species R. prolixus is the main vector species of Chagas disease in some countries of Latin America (Dias et al 2002;Abad-Franch & Monteiro 2007;Ponce 2007). The species R. neglectus and R. robustus are important vectors, particularly in Brazil, since they are widely distributed among Brazilian states (Gurgel-Gonçalves et al 2012) and have been found to be infected with T. cruzi (Aguilar et al 2007;Silistino-Souza et al 2013). R. nasutus is considered to be of secondary importance in the transmission of T. cruzi (Alencar 1987), and R. montenegrensis and R. domesticus are vectors of the protozoan T. rangeli (Steindel et al 1991;Meneguetti et al 2014); the latter species has been to be found infected by T. cruzi in the Brazilian states of Santa Catarina and São Paulo (Schlemper et al 1985).…”

Section: Introductionmentioning

confidence: 99%

Cystic spermatogenesis in three species of theprolixuscomplex (Hemiptera: Triatominae)

Alevi

Castro

Oliveira

et al. 2015

Italian Journal of Zoology

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The reproductive biology of triatomines and, more specifically, the general aspects of spermatogenesis and spermiogenesis are well known. However, reported structural analyses of the testicles are restricted to the genus Triatoma. Thus, this paper describes the spermatogenesis of three species of the genus Rhodnius (R. neglectus, R. prolixus and R. robustus), by means of structural analysis. The general analysis of semi-thin sections of testicular follicles of R. prolixus, R. robustus and R. neglectus revealed that spermatogenesis is cystic in these species. Furthermore, the structural analysis of the spermatogenesis of R. prolixus (Colombia and Costa Rica), R. robustus and R. neglectus showed stages of spermatogenesis. In this paper, the analysis of spermatogenesis of three Rhodnius species shed light on this cystic spermatogenesis phenomenon; no intraespecific differences were observed among R. prolixus from different countries. Thus, although new structural analyses in other genera of the subfamily Triatominae should be performed, this paper describes cystic spermatogenesis in three species of the genus Rhodnius. These results contribute to the knowledge of the class Insecta and allow for a more detailed study of the reproductive biology of these important vectors of Chagas disease.

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Section: Introductionmentioning

confidence: 99%

Cystic spermatogenesis in three species of theprolixuscomplex (Hemiptera: Triatominae)

Alevi

Castro

Oliveira

et al. 2015

Italian Journal of Zoology

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“…In the 40 municipalities analyzed, the vector in the domiciliary region was absent. According to Silistino-Souza et al (2013), populations of T. sordida of Brazil may show from cryptic speciation, allowing for better adaptation of this vector to different environments.…”

Section: Discussionmentioning

confidence: 99%

“…Currently, 65 triatomine species have been identified in Brazil ) and were found to be involved in the transmission of Chagas disease, highlighting Triatoma infestans, Panstrongylus megistus, Triatoma brasiliensis, Triatoma sordida, Triatoma pseudomaculata, and Rhodnius neglectus (Dias and Schofield, 1998;Silistino-Souza et al, 2013). After the International Certification of Elimination of Chagas Disease Transmission by T. infestans, conferred by the Pan American Health Organization, other species were found to be involved in the transmission of Chagas disease in the State of São Paulo; for T. sordida, P. megistus, and R. neglectus, recent entomological lifting showed a high incidence of these hemipterans inhabiting peri and intradomiciliary regions and, in some cases, were infected with T. cruzi (Wanderley et al, 2007;Silva et al, 2011;Silistino-Souza et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…After the International Certification of Elimination of Chagas Disease Transmission by T. infestans, conferred by the Pan American Health Organization, other species were found to be involved in the transmission of Chagas disease in the State of São Paulo; for T. sordida, P. megistus, and R. neglectus, recent entomological lifting showed a high incidence of these hemipterans inhabiting peri and intradomiciliary regions and, in some cases, were infected with T. cruzi (Wanderley et al, 2007;Silva et al, 2011;Silistino-Souza et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…These insects have been observed in 13 Brazilian states, including Bahia, Distrito Federal, Goiás, Maranhão, Minas Gerais, Mato Grosso do Sul, Mato Grosso, Pernambuco, Piauí, Paraná, Rio de Janeiro, São Paulo, and Tocantins (Gurguel-Gonçalves et al, 2012). In Minas Gerais, São Paulo, and Goiás, evidence exists of colony formation in domiciliary regions (Barretto et al, 1968;Silva et al, 1999;de Oliveira and Silva, 2007;Silistino-Souza et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Entoepidemiology of Chagas disease in the Western region of the State of São Paulo from 2004 to 2008, and cytogenetic analysis in Rhodnius neglectus (Hemiptera, Triatominae)

Alevi

Rodas²,

Tartarotti

et al. 2015

Genet. Mol. Res.

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Morphometric variability among the species of the Sordida subcomplex (Hemiptera: Reduviidae: Triatominae): evidence for differentiation across the distribution range of Triatoma sordida

et al. 2017

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BackgroundThe Sordida subcomplex (Triatominae) comprises four species, Triatoma garciabesi, T. guasayana, T. patagonica and T. sordida, which differ in epidemiological importance and adaptations to human environments. Some morphological similarities among species make taxonomic identification, population differentiation and species delimitation controversial. Triatoma garciabesi and T. sordida are the most similar species, having been considered alternatively two and a single species until T. garciabesi was re-validated, mostly based on the morphology of male genitalia. More recently, T. sordida from Argentina has been proposed as a new cryptic species distinguishable from T. sordida from Brazil, Bolivia and Paraguay by cytogenetics. We studied linear and geometric morphometry of the head, wings and pronotum in populations of these species aiming to find phenotypic markers for their discrimination, especially between T. sordida and T. garciabesi, and if any set of variables that validates T. sordida from Argentina as a new species.ResultsHead width and pronotum length were the linear variables that best differentiated species. Geometric morphometry revealed significant Mahalanobis distances in wing shape between all pairwise comparisons. Triatoma patagonica exhibited the best discrimination and T. garciabesi overlapped the distribution of the other species in the morphometric space of the first two DFA axes. Head shape showed differentiation between all pairs of species except for T. garciabesi and T. sordida. Pronotum shape did not differentiate T. garciabesi from T. guasayana. The comparison between T. garciabesi and T. sordida from Argentina and T. sordida from Brazil and Bolivia revealed low differentiation based on head and pronotum linear measurements. Pronotum and wing shape were different between T. garciabesi and T. sordida from Brazil and Bolivia and T. sordida from Argentina. Head shape did not differentiate T. garciabesi from T. sordida from Argentina.ConclusionsWing shape best delimited the four species phenotypically. The proposed cryptic species, T. sordida from Argentina, differed from T. sordida from Brazil and Bolivia in all measured shape traits, suggesting that the putative new species may not be cryptic. Additional studies integrating cytogenetic, phenotypic and molecular markers, as well as cross-breeding experiments are needed to confirm if these three entities represent true biological species.Electronic supplementary materialThe online version of this article (10.1186/s13071-017-2350-y) contains supplementary material, which is available to authorized users.

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Entoepidemiology of Chagas disease in northwest São Paulo and cytogenetic analysis of its main vector, Triatoma sordida (Hemiptera: Triatominae)

Cited by 4 publications

References 33 publications

Cystic spermatogenesis in three species of theprolixuscomplex (Hemiptera: Triatominae)

Cystic spermatogenesis in three species of theprolixuscomplex (Hemiptera: Triatominae)

Entoepidemiology of Chagas disease in the Western region of the State of São Paulo from 2004 to 2008, and cytogenetic analysis in Rhodnius neglectus (Hemiptera, Triatominae)

Morphometric variability among the species of the Sordida subcomplex (Hemiptera: Reduviidae: Triatominae): evidence for differentiation across the distribution range of Triatoma sordida

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