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Title: Potential Distribution of Chagas Disease Vectors (Hemiptera, Reduviidae, Triatominae) in Colombia, Based on Ecological Niche Modeling
Author: Parra Henao, Gabriel
Suárez Escudero, Laura C.
González Caro, Sebastián
Issue Date: 6-Dec-2016
Keywords: enfermedad de Chagas
infection monitoring
ecological niche
Resume: Triatomines (Hemiptera, Reduviidae) are hematophagous insects that are considered important vectors of Trypanosoma cruzi.They arewidely distributed in Americawith rare occurrences in Eastern Asia, though they are primarily found in the Neotropical region. Disease transmission occurs from southernUnited States to Argentina, with approximately 25% of the human population at risk. Triatomines have a wide range of climatic and ecological tolerability because they inhabit diverse ecosystems, from humid to dry forests across the Americas. They are found at different altitudes and have high vagility, which allows them to exploit diverse food resources and to find different resting sites, including intra- and peridomiciliary habitats. Therefore, at the species level, habitat preferences are influenced by environmental factors, which can strongly control efforts. Ecological niche models are empirical or mathematical estimates of species ecological niche in terms of suitable habitat conditions. They permit the association of different ecogeographical variables (e.g., environmental, topographical, and anthropogenic) with the species distribution, by identifying the variables that constrain and define the particular niche. The modeling outcome can be a spatial representation of the favorable habitat for a species occurrence. Therefore, suitability maps for the species, as function of their ecological niche, can be created.
Abstract: Ecological niche modeling of Triatominae bugs allowus 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.
Program: Medicina
Headquarters: Santa Marta
Type: Artículo
CC Licence: Licencia CC
Citation: Parra Henao, G., Suárez Escudero, L., González Caro, S. . (2016). Potential Distribution of Chagas Disease Vectors . Santa Marta: Universidad Cooperativa de Colombia.
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Appears in Collections:Medicina

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