Classification, evolution, and species groups within the Triatominae

Schofield, Christopher J.; Galvão, Cléber

doi:10.1016/j.actatropica.2009.01.010

Cited by 331 publications

(370 citation statements)

References 78 publications

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“…Las estrategias de control y vigilancia vectorial para la enfermedad de Chagas se fundamentan en el conocimiento de las características biológicas y ecoepidemiológicas de los vectores responsables de la transmisión de T. cruzi (1,3,18).…”

Section: Discussionunclassified

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Distribución geográfica y ecoepidemiología de la fauna de triatominos (Reduviidae: Triatominae) en la Isla Margarita del departamento de Bolívar, Colombia

et al. 2010

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Introducción. Los reportes sobre la diversidad de triatominos y algunos aspectos ecoepidemiológicos en la Isla Margarita se han limitado sólo a dos de los cinco municipios que la conforman. El conocimiento de las especies, su hábitat y la infección, es fundamental para establecer el riesgo en áreas endémicas para la enfermedad de Chagas. Objetivo. Describir la fauna de triatominos, la distribución y la infección por Trypanosoma cruzi en la Isla Margarita, con el fin de aportar conocimientos que permitan establecer y estratificar el riesgo de transmisión de la zona. Materiales y métodos. Se realizó la captura de triatominos en las viviendas y el extradomicilio. En las viviendas se hizo búsqueda activa en el intradomicilio y el peridomicilio, mientras en el extradomicilio, se hizo en palmas y nidos de aves. La infección por T. cruzi se determinó por PCR a partir de las heces. Resultados. Se capturaron 1.154 insectos de cinco especies en los municipios de la isla, Triatoma maculata y Rhodnius pallescens mostraron altos índices de infección en el intra domicilio y en el peridomicilio en Mompós y Talaigua Nuevo. En las palmas, R. pallescens fue hallado infectado en todos los municipios y Eratyrus cuspidatus sólo en San Fernando y Margarita. Conclusión. La presencia de triatominos infectados en las viviendas y en las palmas en los cinco municipios de la isla, llama la atención sobre el potencial riesgo que representan estos insectos en la zona.Palabras clave: enfermedad de Chagas, Triatominae, Trypanosoma cruzi, Triatoma spp., Rhodnius spp., Colombia.Distribution and ecoepidemiology of the triatomine fauna (Hemiptera: Reduviidae) in Margarita Island, Bolívar, Colombia Introduction. Information concerning to triatomine diversity and some eco-epidemiologic aspects on Margarita Island has been recorded only from two of the five counties on the island. Knowledge about species habitat and their natural infection is essential to establish the risk for Chagas disease in endemic areas. Objective. The distribution of triatomine insect fauna and its infection with Trypanosoma cruzi was described in order to establish and to stratify the risk of Chagas disease transmission. Material and methods. Each of the 5 counties on Margarita Island were surveyed for triatomid insects inside and outside each dwelling. In the extradomicilary area, searches were conducted in the palms and bird nests located within forests and in pastures near domiciles. Infection with T. cruzi was determined amplifying by PCR the DNA extracted from triatomine feces. Results. Five species of Reduviidae were recovered among the 1,154 triatomines captured in the 5 counties. Triatoma maculata and Rhodnius pallescens showed high infection rates within dwellings and as well as in the peridomestic areas in Mompós and Talaigua Nuevo. On the palm trees, only R. pallescens and Eratyrus cuspidatus were found infected, and only in San Fernando and Margarita. In Cicuco, only R. pallescens was infected. Presence of Triatoma dimidiata was also ascertained. Conclusion. Infec...

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Section: Discussionunclassified

“…T. cruzi es transmitido principalmente por insectos hematófagos de la subfamilia Triatominae, en la cual se cuentan actualmente 141 especies (2,3). Aunque no todas estas especies tienen importancia en la epidemiología de la enfermedad, sí pueden considerarse como vectores potenciales.…”

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Distribución geográfica y ecoepidemiología de la fauna de triatominos (Reduviidae: Triatominae) en la Isla Margarita del departamento de Bolívar, Colombia

et al. 2010

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“…About 6 million people worldwide, mostly in Latin America, are estimated to be affected by Chagas disease, which is caused by Trypanosoma cruzi (49,50). Trypanosoma cruzi is mainly transmitted by contact with the feces/urine of infected hematophagous Triatominae insects like Rp (51), which typically lives in the wall or roof cracks of poorly-constructed homes in rural or suburban areas.…”

Section: Rhodnius Prolixus Nitrophorinsmentioning

confidence: 99%

Nitrophorins and nitrobindins: structure and function

Ascenzi

Masi

et al. 2017

Biomolecular Concepts

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Classical all α-helical globins are present in all living organisms and are ordered in three lineages: (i) flavohemoglobins and single domain globins, (ii) protoglobins and globin coupled sensors and (iii) truncated hemoglobins, displaying the 3/3 or the 2/2 all α-helical fold. However, over the last two decades, all β-barrel and mixed α-helical-β-barrel heme-proteins displaying hemebased functional properties (e.g. ligand binding, transport and sensing) closely similar to those of all α-helical globins have been reported. Monomeric nitrophorins (NPs) and α 1 -microglobulin (α 1 -m), belonging to the lipocalin superfamily and nitrobindins (Nbs) represent prototypical heme-proteins displaying the all β-barrel and mixed α-helical-β-barrel folds. NPs are confined to the Reduviidae and Cimicidae families of Heteroptera, whereas α 1 -m and Nbs constitute heme-protein families spanning bacteria to Homo sapiens. The structural organization and the reactivity of the stable ferric solvent-exposed heme-Fe atom suggest that NPs and Nbs are devoted to NO transport, storage and sensing, whereas Hs-α 1 -m participates in heme metabolism. Here, the structural and functional properties of NPs and Nbs are reviewed in parallel with those of sperm whale myoglobin, which is generally taken as the prototype of monomeric globins.

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“…HYPŠA et al (2002) 13 published a phylogenetic study of 57 species of Triatominae and proposed the elevation of the ¨T. flavida complex¨ to the genus Nesotriatoma (including N. flavida, N. bruneri and N. obscura) according to the position of the clade T. flavida and T. bruneri, although this idea is not generally accepted 22 .…”

Section: Introductionmentioning

confidence: 99%

“…The subfamily Triatominae (Hemiptera, Reduviidae) is currently divided in five tribes, 15 genera and 140 species 22 . Most species occur in sylvatic ecotopes, associated with small nest-building mammals or birds, but several have made the transition to domestic habitats, where they feed on humans and domestic animals 4 .…”

Section: Introductionmentioning

confidence: 99%

Genetic variability of Triatoma flavida and Triatoma bruneri (Hemiptera: Reduviidae) by RAPD-PCR technique

Fraga¹,

Rodríguez²,

Fuentes³

et al. 2011

Rev. Inst. Med. trop. S. Paulo

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SUMMARYThe Triatominae (Hemiptera:Reduviidae) contains the principal and potential Chagas disease vectors present in Mexico, Central America and South America. Triatoma flavida and T. bruneri are Cuban species. These species are closely related according to morphology and were considered synonyms until 1981, when they were separated on the grounds of external characters of the body and the morphology of male genitalia. The present study seeks to analyze genetic polymorphism of T. flavida and T. bruneri populations using RAPD techniques, and to assess the genetic relationship between these species. Ten random primers were used to evaluate the genetic variability among species using RAPD-PCR. The genetic flow among them was calculated. The dendrogram based on calculated Jaccard distances showed two clearly distinguishable clusters which coincided with the studied species. Within each species, moderate genetic differentiation (Fst 0.05-0.15) and migration rates (N > 1) were found among populations, that reveal gene flow and genetic homogeneity. Between species, the Fst value showed a high genetic differentiation and the migration rate was insufficient to maintain genetic homogeneity, and confirmed the absence of gene flow between them. Our results confirm the genetic variability among T. flavida and T. bruneri species.

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Classification, evolution, and species groups within the Triatominae

Cited by 331 publications

References 78 publications

Distribución geográfica y ecoepidemiología de la fauna de triatominos (Reduviidae: Triatominae) en la Isla Margarita del departamento de Bolívar, Colombia

Distribución geográfica y ecoepidemiología de la fauna de triatominos (Reduviidae: Triatominae) en la Isla Margarita del departamento de Bolívar, Colombia

Nitrophorins and nitrobindins: structure and function

Genetic variability of Triatoma flavida and Triatoma bruneri (Hemiptera: Reduviidae) by RAPD-PCR technique

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