Análisis morfométrico de Panstrongylus geniculatus de Caracas, Venezuela

Aldana, Elis; Heredia-Coronado, Edgar; Avendaño-Rangel, Francys; Lizano, Eliécer; Concepción, Juan Luís; Bonfante-Cabarcas, Rafael; Rodríguez-Bonfante, Claudia; Pulido, María Magdalena

doi:10.7705/biomedica.v31i1.341

Cited by 12 publications

(9 citation statements)

References 16 publications

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“…5a). All these findings could be a signal of an intrusive process from sylvatic ecotopes to domestic ones facilitated by adaptation, occurring in parallel in Colombia, Venezuela and Brazil [42–45], even accompanied by morphological changes in insects [54, 55]. This pattern of ecotope intrusion explains the incrimination of P. geniculatus in oral outbreaks in Colombia [28, 56]; it is mandatory that surveillance strategies are deployed not only to avoid incrimination but also a possible domiciliation process.…”

Section: Discussionmentioning

confidence: 99%

Untangling the transmission dynamics of primary and secondary vectors of Trypanosoma cruzi in Colombia: parasite infection, feeding sources and discrete typing units

et al. 2016

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Background Trypanosoma cruzi is the causative agent of Chagas disease. Due to its genetic diversity has been classified into six Discrete Typing Units (DTUs) in association with transmission cycles. In Colombia, natural T. cruzi infection has been detected in 15 triatomine species. There is scarce information regarding the infection rates, DTUs and feeding preferences of secondary vectors. Therefore, the aim of this study was to determine T. cruzi infection rates, parasite DTU, ecotopes, insect stages, geographical location and bug feeding preferences across six different triatomine species.MethodsA total of 245 insects were collected in seven departments of Colombia. We conducted molecular detection and genotyping of T. cruzi with subsequent identification of food sources. The frequency of infection, DTUs, TcI genotypes and feeding sources were plotted across the six species studied. A logistic regression model risk was estimated with insects positive for T. cruzi according to demographic and eco-epidemiological characteristics.ResultsWe collected 85 specimens of Panstrongylus geniculatus, 77 Rhodnius prolixus, 37 R. pallescens, 34 Triatoma maculata, 8 R. pictipes and 4 T. dimidiata. The overall T. cruzi infection rate was 61.2% and presented statistical associations with the departments Meta (OR: 2.65; 95% CI: 1.69–4.17) and Guajira (OR: 2.13; 95% CI: 1.16–3.94); peridomestic ecotope (OR: 2.52: 95% CI: 1.62–3.93); the vector species P. geniculatus (OR: 2.40; 95% CI: 1.51–3.82) and T. maculata (OR: 2.09; 95% CI: 1.02–4.29); females (OR: 2.05; 95% CI: 1.39–3.04) and feeding on opossum (OR: 3.15; 95% CI: 1.85–11.69) and human blood (OR: 1.55; 95% CI: 1.07–2.24). Regarding the DTUs, we observed TcI (67.3%), TcII (6.7%), TcIII (8.7%), TcIV (4.0%) and TcV (6.0%). Across the samples typed as TcI, we detected TcIDom (19%) and sylvatic TcI (75%). The frequencies of feeding sources were 59.4% (human blood); 11.2% (hen); 9.6% (bat); 5.6% (opossum); 5.1% (mouse); 4.1% (dog); 3.0% (rodent); 1.0% (armadillo); and 1.0% (cow).ConclusionsNew scenarios of T. cruzi transmission caused by secondary and sylvatic vectors are considered. The findings of sylvatic DTUs from bugs collected in domestic and peridomestic ecotopes confirms the emerging transmission scenarios in Colombia.Electronic supplementary materialThe online version of this article (doi:10.1186/s13071-016-1907-5) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Untangling the transmission dynamics of primary and secondary vectors of Trypanosoma cruzi in Colombia: parasite infection, feeding sources and discrete typing units

et al. 2016

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“…Both works analysed T. brasiliensis populations. Studies in other species indicate contradicting results for T. infestans (Dujardin et al ., 1997a, 1997b), claiming ecotope differences in the cephalic capsule, and congruent results for Panstrongylus geniculatus (Hemiptera: Reduviidae) (Aldana et al ., 2011) because of the absence of sexual dimorphism in this structure.…”

Section: Discussionmentioning

confidence: 63%

“…Studies in other species indicate contradicting results for T. infestans (Dujardin et al, 1997a(Dujardin et al, , 1997b, claiming ecotope differences in the cephalic capsule, and congruent results for Panstrongylus geniculatus (Hemiptera: Reduviidae) (Aldana et al, 2011) because of the absence of sexual dimorphism in this structure. The picture emerging for wing patterns is consistent because other studies have found sexual dimorphism in wing size (Schachter-Broide et al, 2004;Aldana et al, 2011) and ecotope-associated differences in wing size and shape (Dujardin et al, 1997a;Schachter-Broide et al, 2004Dumonteil et al, 2007). However, T. brasiliensis has never been adopted as a model species and never tested for sexual dimorphism of shape.…”

Section: Shape and Size Variations In Natural Populations Of Triatominesmentioning

confidence: 88%

“…The picture emerging for wing patterns is consistent because other studies have found sexual dimorphism in wing size (Schachter‐Broide et al ., 2004; Aldana et al ., 2011) and ecotope‐associated differences in wing size and shape (Dujardin et al ., 1997a; Schachter‐Broide et al ., 2004, 2009; Dumonteil et al ., 2007). However, T. brasiliensis has never been adopted as a model species and never tested for sexual dimorphism of shape.…”

Section: Discussionmentioning

confidence: 99%

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Ecotope effect in Triatoma brasiliensis (Hemiptera: Reduviidae) suggests phenotypic plasticity rather than adaptation

Batista

Fernandes

Cordeiro‐Estrela

et al. 2012

Medical Vet Entomology

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Triatoma brasiliensis (Hemiptera: Reduviidae) is an important vector of Chagas' disease in both sylvatic and peridomestic ecotopes. Discriminating between these populations of Triatominae has been proposed as a means of investigating re-infestation rates of human dwellings. Geometric morphometrics have been widely applied in the study of Triatominae polymorphisms at species and population levels. This study characterizes morphometric differences between sylvatic and peridomestic populations, as well as between sexes in T. brasiliensis specimens from Jaguaruana, Ceará, in northeastern Brazil. No differences in either the shape or size of the cephalic capsule were apparent between sexes or ecotopes. However, the wings showed differentiation in shape and size. Sexual dimorphism was detected, with females presenting significantly higher values and conformations. Size differentiation was also evident, with sylvatic specimens being generally larger than peridomestic examples. These results indicate that differences in the wings of T. brasiliensis may be related to the existence of phenotypic plasticity, and variations in size and shape may be associated with different ecotopes, possibly as a result of conditions in each micro-habitat, such as temperature, relative humidity, food supply and density.

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“… 2 , 3 , 17 Studies on the taxonomy of this genus and the identification of P. geniculatus have been problematic because most are based on morphometry and karyotyping, but few have employed molecular markers. 17 , 18 , 19 , 20 ) The phylogenies based on morphological traits presents the Panstrongylus genus as a monophyletic group, whereas the ITS-2 (rDNA) phylogenetic trees suggest that it is polyphyletic group of Triatoma species from South, Central and North America. 9 , 21 In another study, using four mitochondrial markers (16S, COI, COII, Cytb ) and two nuclear (18S and 28S) ones, Panstrongylus fell into two groups.…”

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confidence: 99%

Systematic review on the biology, ecology, genetic diversity and parasite transmission potential of Panstrongylus geniculatus (Latreille 1811) in Latin America

Vivas

García

Guhl

et al. 2021

Mem. Inst. Oswaldo Cruz

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Panstrongylus geniculatus (Latreille, 1811) is the triatomine with the largest geographic distribution in Latin America. It has been reported in 18 countries from southern Mexico to northern Argentina, including the Caribbean islands. Although most reports indicate that P. geniculatus has wild habitats, this species has intrusive habits regarding human dwellings mainly located in intermediate deforested areas. It is attracted by artificial light from urban and rural buildings, raising the risk of transmission of Trypanosoma cruzi . Despite the wide body of published information on P. geniculatus , many knowledge gaps exist about its biology and epidemiological potential. For this reason, we analysed the literature for P. geniculatus in Scopus, PubMed, Scielo, Google Scholar and the BibTriv3.0 databases to update existing knowledge and provide better information on its geographic distribution, life cycle, genetic diversity, evidence of intrusion and domiciliation, vector-related circulating discrete taxonomic units, possible role in oral T. cruzi transmission, and the effect of climate change on its biology and epidemiology.

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Análisis morfométrico de Panstrongylus geniculatus de Caracas, Venezuela

Cited by 12 publications

References 16 publications

Untangling the transmission dynamics of primary and secondary vectors of Trypanosoma cruzi in Colombia: parasite infection, feeding sources and discrete typing units

Untangling the transmission dynamics of primary and secondary vectors of Trypanosoma cruzi in Colombia: parasite infection, feeding sources and discrete typing units

Ecotope effect in Triatoma brasiliensis (Hemiptera: Reduviidae) suggests phenotypic plasticity rather than adaptation

Systematic review on the biology, ecology, genetic diversity and parasite transmission potential of Panstrongylus geniculatus (Latreille 1811) in Latin America

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