Environmental determinants of the distribution of Chagas disease vectors in south-eastern Guatemala

  • Dulce Maria Bustamante | dbusta1@ufl.edu Laboratory of Applied Entomology and Parasitology, Department of Biology, School of Chemical Sciences and Pharmacy, San Carlos University, Guatemala; Current address: Florida Medical Entomology Laboratory, University of Florida, Vero Beach, FL, United States.
  • Maria Carlota Monroy Laboratory of Applied Entomology and Parasitology, Department of Biology, School of Chemical Sciences and Pharmacy, San Carlos University, Guatemala.
  • Antonieta Guadalupe Rodas Laboratory of Applied Entomology and Parasitology, Department of Biology, School of Chemical Sciences and Pharmacy, San Carlos University, Guatemala.
  • Jaime Abraham Juarez Entomology Section, Ministry of Public Health and Social Assistance; Current address: Pan American Health Organization, Guatemala City, Guatemala.
  • John B. Malone Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, United States.

Abstract

The associations between the presence of triatomines and environmental variables were studied using correlation analysis and logistic regression models for a sample of villages in the south-eastern provinces of Guatemala. Information on the presence of Triatoma dimidiata, T. nitida and Rhodnius prolixus came from entomological surveys carried out by the Ministry of Health of Guatemala as part of its vector control programme. Environmental information for each village was extracted from digital thematic maps developed by the Ministry of Agriculture. The presence of T. nitida was found to be significantly associated with the average minimum temperature. The odds of presence of T. nitida in a village decreased as the average minimum temperature increased. T. nitida exists at altitudes above 1000 m above sea level in temperate regions. The presence of R. prolixus showed a significant positive association with maximum absolute temperature and relative humidity. The logistic regression model for R. prolixus showed a good fit and predicted suitable habitats in the provinces of Chiquimula, Zacapa and Jalapa, which agrees with the known distribution of the species. Habitat partitioning between R. prolixus and T. dimidiata is suggested by their significant and opposite associations with maximum absolute temperature. Improved models to predict suitable habitats for T. dimidiata hold promise for spatial targeting of integrated vector management.

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Published
2007-05-01
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Original Articles
Keywords:
Triatominae, Chagas disease, Guatemala, environment, geographic information system.
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How to Cite
Bustamante, D. M., Monroy, M. C., Rodas, A. G., Abraham Juarez, J., & Malone, J. B. (2007). Environmental determinants of the distribution of Chagas disease vectors in south-eastern Guatemala. Geospatial Health, 1(2), 199-211. https://doi.org/10.4081/gh.2007.268

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