Phylogenetic and Phenotypic Relationships Among<i>Triatoma carcavalloi</i>(Hemiptera: Reduviidae: Triatominae) and Related Species Collected in Domiciles in Rio Grande do Sul State, Brazil

Almeida, Carlos Eduardo de; Marcet, Paula L.; Gumiel, Márcia; Takiya, Daniela Maeda; Cardozo-de-Almeida, Margareth; Pacheco, Raquel S.; Lopes, Catarina Macedo; Dotson, Ellen M.; Costa, Jane

doi:10.3376/038.034.0201

Cited by 2 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A combinação de resultados de marcadores fenotípicos e genotípicos já foi vastamente explorada para o grupo dos triatomíneos (ex: Dumonteil et al, 2009;Almeida et al, 2009). Para o complexo T. brasiliensis, os marcadores moleculares já foram amplamente utilizados isoladamente, baseados na variação de genes do DNA mitocondrial Almeida et al, 2008Gardim et al, 2014).…”

Section: Os Vetores Da Doença De Chagas Com Destaque Aos Que Ocorrem ...unclassified

Estrutura populacional de Triatoma brasiliensis (Hemiptera, Triatominae) de distintos ecótopos e municípios dos estados brasileiros do Rio Grande do Norte e Paraíba inferida pela variação morfométrica e molecular

Santana¹

View full text Add to dashboard Cite

In endemic areas of Chagas disease, the protozoan Trypanosoma cruzi circulates in different ecotopes: in the wild, in the peridomicillary and in the domestic. A Chagasic outbreak was recently reported in 2018 in the State of Rio Grande do Norte RN, where Triatoma brasiliensis is the most important vector of Chagas disease. In the present study, populations of different ecotopes in the Rio Grande do Norte RN and Paraíba PB, where there are records of T. brasiliensis that were analyzed using geometric morphometry (with 13 landmarks on the right wings) and the molecular marker cytochrome b. The morphometric analyses were based on 698 individuals and the molecular analyzes on 220 individuals from populations of eight municipalities, ranging 240 km on the east-west axis and 95 km on the north-south axis. For all pairs of populations, the Mahalanobis distances (DM) and the molecular differentiation coefficient (ΦST) were calculated. The results were illustrated in DM, ΦST dendrograms, in addition to factorial maps of principal components (PCA) and canonical variate (CVA) analysis. The Mantel test was applied to verify the correlations between the matrices obtained. Morphometric analysis showed that sexual dimorphism exists, with females being larger than males, with a significant Mahalanobis distance (P <0.0001). It was also observed that the peridomestic insects were larger than the wild insects (P <0.0001). To test the role of ecotypic versus geographic variation in the distribution of morphometric and genetic variability, different groupings were made with the populations. Both markers showed statistically significant differentiation, except between some groups within the district of Patos, which comprises geographically associated municipalities. Mantel tests correlating geographic and morphometric or genetic distances showed low conformity (R 2 <0.35), indicating that factors, other than isolation by distance acted in the distribution of the variation found. The factorial maps with the CVA defined the populations only in geographic microscale. This pattern is possibly the result of demographic events in populations collected at the same point, such as bottlenecks or a founding effect.

show abstract

Section: Os Vetores Da Doença De Chagas Com Destaque Aos Que Ocorrem ...unclassified

Estrutura populacional de Triatoma brasiliensis (Hemiptera, Triatominae) de distintos ecótopos e municípios dos estados brasileiros do Rio Grande do Norte e Paraíba inferida pela variação morfométrica e molecular

Santana¹

View full text Add to dashboard Cite

show abstract

Geographic Distribution of Chagas Disease Vectors in Brazil Based on Ecological Niche Modeling

Gurgel-Gonçalves

Galvão

Costa

et al. 2012

Journal of Tropical Medicine

Self Cite

202

199

View full text Add to dashboard Cite

Although Brazil was declared free from Chagas disease transmission by the domestic vector Triatoma infestans, human acute cases are still being registered based on transmission by native triatomine species. For a better understanding of transmission risk, the geographic distribution of Brazilian triatomines was analyzed. Sixteen out of 62 Brazilian species that both occur in >20 municipalities and present synanthropic tendencies were modeled based on their ecological niches. Panstrongylus geniculatus and P. megistus showed broad ecological ranges, but most of the species sort out by the biome in which they are distributed: Rhodnius pictipes and R. robustus in the Amazon; R. neglectus, Triatoma sordida, and T. costalimai in the Cerrado; R. nasutus, P. lutzi, T. brasiliensis, T. pseudomaculata, T. melanocephala, and T. petrocchiae in the Caatinga; T. rubrovaria in the southern pampas; T. tibiamaculata and T. vitticeps in the Atlantic Forest. Although most occurrences were recorded in open areas (Cerrado and Caatinga), our results show that all environmental conditions in the country are favorable to one or more of the species analyzed, such that almost nowhere is Chagas transmission risk negligible.

show abstract

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

Cited by 2 publications

References 12 publications

Estrutura populacional de Triatoma brasiliensis (Hemiptera, Triatominae) de distintos ecótopos e municípios dos estados brasileiros do Rio Grande do Norte e Paraíba inferida pela variação morfométrica e molecular

Estrutura populacional de Triatoma brasiliensis (Hemiptera, Triatominae) de distintos ecótopos e municípios dos estados brasileiros do Rio Grande do Norte e Paraíba inferida pela variação morfométrica e molecular

Geographic Distribution of Chagas Disease Vectors in Brazil Based on Ecological Niche Modeling

Contact Info

Product

Resources

About