House-Level Risk Factors for Triatoma dimidiata Infestation in Colombia

Parra-Henao, Gabriel; Segura-Cardona, Ángela; Quirós-Gómez, Óscar; Angulo, Vı́ctor Manuel; Nast, Alexander

doi:10.4269/ajtmh.14-0273

Cited by 21 publications

(26 citation statements)

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“…Algunas de las características de la vivienda asociadas con la presencia de (8). También, se ha reportado como factor asociado con la infestación la localización de la casa cerca de la periferia de la localidad, la presencia de gallineros y de dos o más perros (8,67).…”

Section: Factores Asociados Con La Presencia De Triatominos En Vivienunclassified

“…También, se ha reportado como factor asociado con la infestación la localización de la casa cerca de la periferia de la localidad, la presencia de gallineros y de dos o más perros (8,67). No obstante, Zeledón, et al, reportaron la colonización por especímenes silvestres de T. dimidiata de un ecótopo artificial en el patio trasero de una casa nueva, bien construida, en Santa Ana, provincia de San José, en Costa Rica (61).…”

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“…Triatoma dimidiata Latreille, 1811 (Hemiptera: Reduviidae: Triatominae) es considerada la segunda especie vectora dada su frecuencia en las viviendas humanas, la tasa de infección natural con T. cruzi y su amplia dispersión en la geografía colombiana. T. dimidiata se halla en gran diversidad de ecótopos, con reporte de diferencias intraespecíficas que sugieren la presencia de varias poblaciones y acentuados contrastes en su relación con los hábitats humanos, por lo cual su perfil epidemiológico tiene alcance diferencial (8,9).…”

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Triatoma dimidiata in Colombia. Distribution, ecology and its epidemiological importance

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Contribución de los autores:Óscar Quirós-Gómez: concepción y diseño del estudio, recolección y resumen de información bibliográfica y escritura del manuscrito Nicolás Jaramillo: recolección de información bibliográfica y escritura del manuscrito Víctor M. Angulo: análisis e interpretación de datos Gabriel Parra-Henao: concepción y diseño del estudio, análisis e interpretación de datos y escritura del manuscrito Todos los autores participaron en la revisión del manuscrito. Triatoma dimidiata es un importante vector de la enfermedad de Chagas en Centroamérica y en los países del norte de Suramérica. En Colombia, tiene una amplia distribución y su presencia se ha reportado en 14 departamentos de las regiones Andina, Caribe, de los Llanos Orientales y del Alto Magdalena, en las cuales ocupa diferentes ecótopos naturales y artificiales. La especie está clasificada como secundaria para la transmisión de Trypanosoma cruzi; sin embargo, su presencia en el ambiente silvestre, peridoméstico y doméstico en la región Andina, y su capacidad de movilizarse entre ellos, le han permitido escapar al control basado en la aspersión con piretroides y ello resalta su importancia en el mantenimiento de la transmisión del parásito debido a la potencial reinfestación de las viviendas. La comprensión de las relaciones de T. dimidiata con su hábitat, así como el empoderamiento de la comunidad, contribuyen al desarrollo de sistemas de control efectivos y perdurables. El propósito de esta revisión fue describir la distribución, los factores de riesgo, la ecología, las características entomológicas y los hábitats de las poblaciones de T. dimidiata en Colombia, y proponer alternativas de intervención acordes con las características particulares de esta especie. Triatoma dimidiata in Colombia: Distribution, ecology and epidemiological importanceTriatoma dimidiata is an important vector of Chagas disease in Central America and countries of northern South America. In Colombia, it has a wide geographical distribution with reported presence in 14 departments in the Andean, Caribbean, Eastern plains and Upper Magdalena regions, where it occupies different natural and artificial ecotopes. The species is considered a secondary vector in the transmission of Trypanosoma cruzi. Its presence in wild, peridomestic and intradomiciliary habitats in the Andean region, coupled with its ability to move between them, has allowed it to escape the control based on pyrethroids spraying, highlighting its importance in maintaining transmission of the parasite through the potential reinfestation of homes. Understanding the relation of T. dimidiata and its habitats, as well as the empowerment of communities, will contribute to the development of effective and lasting control systems. The purpose of this review was to describe the distribution, risk factors, ecology, entomological features and habitats of T. dimidiata populations in Colombia, and to propose alternative interventions in agreement with the specific characteristics of the species.

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Triatoma dimidiata in Colombia. Distribution, ecology and its epidemiological importance

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“…However, CDCP does not use spatial technologies like GPS, GIS, and spatial analysis in the endemic departments [24]. The main species transmitting T. cruzi in Colombia are R. prolixus and T. dimidiata , which present a very complex epidemiological cycle that involves domestic, peridomestic, and sylvatic habitats [25, 26]. However, other species such as P. geniculatus , R. pallescens , T. maculata , and T. venosa play an important role as secondary vectors of the parasite.…”

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confidence: 99%

Potential Distribution of Chagas Disease Vectors (Hemiptera, Reduviidae, Triatominae) in Colombia, Based on Ecological Niche Modeling

Parra-Henao

Suárez-Escudero

González‐Caro³

2016

Journal of Tropical Medicine

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Ecological niche modeling of Triatominae bugs allow us to establish the local risk of transmission of the parasite Trypanosoma cruzi, which causes Chagas disease. This information could help to guide health authority recommendations on infection monitoring, prevention, and control. In this study, we estimated the geographic distribution of triatomine species in Colombia and identified the relationship between landscape structure and climatic factors influencing their occurrence. A total of 2451 records of 4 triatomine species (Panstrongylus geniculatus, Rhodnius pallescens, R. prolixus, and Triatoma maculata) were analyzed. The variables that provided more information to explain the ecologic niche of these vectors were related to precipitation, altitude, and temperature. We found that the species with the broadest potential geographic distribution were P. geniculatus, R. pallescens, and R. prolixus. In general, the models predicted the highest occurrence probability of these vectors in the eastern slope of the Eastern Cordillera, the southern region of the Magdalena valley, and the Sierra Nevada of Santa Marta.

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“…[1][2][3] Trypanosoma cruzi is the causative agent of Chagas disease, a condition that according to the last estimation made by WHO in Colombia affected nearly 437,960 habitants by 2010, and there were at risk nearly 4,813,543 people, 131,388 persons with Chagasic cardiopathy, 5,274 annual cases due to vectorial transmission, 1,046 new cases due to congenital transmission each year, and 116,221 women with ages ranging between 15 and 44 years were infected. 4 Triatoma dimidiata is a highly variable species with a high genetic diversity and is in fact a species complex; this diversity may indeed explain the ecological diversity of habitats and behavior encountered by this complex.…”

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confidence: 99%

Environmental Determinants of the Distribution of Chagas Disease Vector Triatoma dimidiata in Colombia

Parra-Henao

Quirós-Gómez

Jaramillo-O

et al. 2016

The American Society of Tropical Medicine and Hygiene

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Abstract. Triatoma dimidiata (Hemiptera: Reduviidae) is a secondary vector of Trypanosoma cruzi in Colombia and represents an important epidemiological risk mainly in the central and oriental regions of the country where it occupies sylvatic, peridomestic, and intradomestic ecotopes, and because of this complex distribution, its distribution and abundance could be conditioned by environmental factors. In this work, we explored the relationship between T. dimidiata distribution and environmental factors in the northwest, northeast, and central zones of Colombia and developed predictive models of infestation in the country. The associations between the presence of T. dimidiata and environmental variables were studied using logistic regression models and ecological niche modeling for a sample of villages in Colombia. The analysis was based on the information collected in field about the presence of T. dimidiata and the environmental data for each village extracted from remote sensing images. The presence of Triatoma dimidiata (Latreille, 1811) was found to be significantly associated with the maximum vegetation index, minimum land surface temperature (LST), and the digital elevation for the statistical model. Temperature seasonality, annual precipitation, and vegetation index were the variables that most influenced the ecological niche model of T. dimidiata distribution. The logistic regression model showed a good fit and predicted suitable habitats in the Andean and Caribbean regions, which agrees with the known distribution of the species, but predicted suitable habitats in the Pacific and Orinoco regions proposing new areas of research. Improved models to predict suitable habitats for T. dimidiata hold promise for spatial targeting of integrated vector management.

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House-Level Risk Factors for Triatoma dimidiata Infestation in Colombia

Cited by 21 publications

References 21 publications

Triatoma dimidiata in Colombia. Distribution, ecology and its epidemiological importance

Triatoma dimidiata in Colombia. Distribution, ecology and its epidemiological importance

Potential Distribution of Chagas Disease Vectors (Hemiptera, Reduviidae, Triatominae) in Colombia, Based on Ecological Niche Modeling

Environmental Determinants of the Distribution of Chagas Disease Vector Triatoma dimidiata in Colombia

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