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Morphometric Wings Similarity among Sylvatic and Domestic Populations of Triatoma infestans (Hemiptera: Reduviidae) from the Gran Chaco Region of Paraguay

Despite sustained efforts for eliminating Triatoma infestans, reinfestation still persists in large part of the endemic area of Chagas disease from the Gran Chaco region. Sylvatic T. infestans populations seem to threat success of control programs of domestic T. infestans. In this study, we analyze...

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Autores principales: de Arias, Antonieta Rojas, Carbajal de la Fuente, Ana Laura, Gómez, Ana, Cecere, María Carla, Rolón, Miriam, Gómez, María Celeste Vega, Villalba, Cesia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The American Society of Tropical Medicine and Hygiene 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5544089/
https://www.ncbi.nlm.nih.gov/pubmed/28829725
http://dx.doi.org/10.4269/ajtmh.16-1013
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author de Arias, Antonieta Rojas
Carbajal de la Fuente, Ana Laura
Gómez, Ana
Cecere, María Carla
Rolón, Miriam
Gómez, María Celeste Vega
Villalba, Cesia
author_facet de Arias, Antonieta Rojas
Carbajal de la Fuente, Ana Laura
Gómez, Ana
Cecere, María Carla
Rolón, Miriam
Gómez, María Celeste Vega
Villalba, Cesia
author_sort de Arias, Antonieta Rojas
collection PubMed
description Despite sustained efforts for eliminating Triatoma infestans, reinfestation still persists in large part of the endemic area of Chagas disease from the Gran Chaco region. Sylvatic T. infestans populations seem to threat success of control programs of domestic T. infestans. In this study, we analyze whether T. infestans collected after a community-wide spraying were survivors or were immigrants from elsewhere using geometric morphometric tools. We used 101 right wings of female T. infestans captured before and after intervention program carried out in 12 de Junio and Casuarina, villages from Paraguayan Chaco, and in Puerto Casado during presprayed collection. There were no significant differences in wing size of domestic T. infestans between pre- and postspraying populations, and between domestic and sylvatic ones. When shape variables originating from postintervention individuals from 12 de Junio were introduced one by one into a discriminant analysis, the greatest weight (53%) was allocated to the sylvatic group. Furthermore, from the prespraying population, 25% were reallocated as postintervention individuals. Only 11% of the insects were reassigned to other groups Puerto Casado and Casuarina. These results suggest that postspraying individuals appear to have different origins. Half of the postspraying individuals from 12 de Junio were similar to the sylvatic ones and 25% of these were similar to those captured in the prespraying period. This remarkable morphometric wings similarity between sylvatic and domestic populations is new evidence suggesting that they could be highly related to each other in the Paraguayan Chaco; human-fed bugs from sylvatic area also support this.
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spelling pubmed-55440892018-04-30 Morphometric Wings Similarity among Sylvatic and Domestic Populations of Triatoma infestans (Hemiptera: Reduviidae) from the Gran Chaco Region of Paraguay de Arias, Antonieta Rojas Carbajal de la Fuente, Ana Laura Gómez, Ana Cecere, María Carla Rolón, Miriam Gómez, María Celeste Vega Villalba, Cesia Am J Trop Med Hyg Articles Despite sustained efforts for eliminating Triatoma infestans, reinfestation still persists in large part of the endemic area of Chagas disease from the Gran Chaco region. Sylvatic T. infestans populations seem to threat success of control programs of domestic T. infestans. In this study, we analyze whether T. infestans collected after a community-wide spraying were survivors or were immigrants from elsewhere using geometric morphometric tools. We used 101 right wings of female T. infestans captured before and after intervention program carried out in 12 de Junio and Casuarina, villages from Paraguayan Chaco, and in Puerto Casado during presprayed collection. There were no significant differences in wing size of domestic T. infestans between pre- and postspraying populations, and between domestic and sylvatic ones. When shape variables originating from postintervention individuals from 12 de Junio were introduced one by one into a discriminant analysis, the greatest weight (53%) was allocated to the sylvatic group. Furthermore, from the prespraying population, 25% were reallocated as postintervention individuals. Only 11% of the insects were reassigned to other groups Puerto Casado and Casuarina. These results suggest that postspraying individuals appear to have different origins. Half of the postspraying individuals from 12 de Junio were similar to the sylvatic ones and 25% of these were similar to those captured in the prespraying period. This remarkable morphometric wings similarity between sylvatic and domestic populations is new evidence suggesting that they could be highly related to each other in the Paraguayan Chaco; human-fed bugs from sylvatic area also support this. The American Society of Tropical Medicine and Hygiene 2017-08-02 2017-05-30 /pmc/articles/PMC5544089/ /pubmed/28829725 http://dx.doi.org/10.4269/ajtmh.16-1013 Text en © The American Society of Tropical Medicine and Hygiene This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Articles
de Arias, Antonieta Rojas
Carbajal de la Fuente, Ana Laura
Gómez, Ana
Cecere, María Carla
Rolón, Miriam
Gómez, María Celeste Vega
Villalba, Cesia
Morphometric Wings Similarity among Sylvatic and Domestic Populations of Triatoma infestans (Hemiptera: Reduviidae) from the Gran Chaco Region of Paraguay
title Morphometric Wings Similarity among Sylvatic and Domestic Populations of Triatoma infestans (Hemiptera: Reduviidae) from the Gran Chaco Region of Paraguay
title_full Morphometric Wings Similarity among Sylvatic and Domestic Populations of Triatoma infestans (Hemiptera: Reduviidae) from the Gran Chaco Region of Paraguay
title_fullStr Morphometric Wings Similarity among Sylvatic and Domestic Populations of Triatoma infestans (Hemiptera: Reduviidae) from the Gran Chaco Region of Paraguay
title_full_unstemmed Morphometric Wings Similarity among Sylvatic and Domestic Populations of Triatoma infestans (Hemiptera: Reduviidae) from the Gran Chaco Region of Paraguay
title_short Morphometric Wings Similarity among Sylvatic and Domestic Populations of Triatoma infestans (Hemiptera: Reduviidae) from the Gran Chaco Region of Paraguay
title_sort morphometric wings similarity among sylvatic and domestic populations of triatoma infestans (hemiptera: reduviidae) from the gran chaco region of paraguay
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5544089/
https://www.ncbi.nlm.nih.gov/pubmed/28829725
http://dx.doi.org/10.4269/ajtmh.16-1013
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