ArticleJournal of medical entomology2026
Predicting current and future areas of ecological suitability for Lutzomyia longipalpis sensu lato in the Americas.
Article in Journal of medical entomology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Leishmania infantum is one of the etiologic agents of leishmaniases in mammals. In the Americas, numerous sand fly species within the Lutzomyia genus drive Leishmania spp. transmission, such as the species complex Lutzomyia longipalpis sensu lato. It remains unknown if climatic changes could facilitate range expansion of Lu. longipalpis, creating conditions for local transmission in previously non-endemic regions. The objectives of this study were to identify the climatic and environmental variables of importance for Lu. longipalpis, current ecologically suitable area across the Americas, and determine future areas of ecological suitability under 30-year time periods. Occurrence records were obtained from GBIF, WRBU, and literature searches. Historic climate data (1981-2010) and projection data for Shared Socioeconomic Pathway 3-7.0 for time periods 2041-2070, and 2071-2100 were obtained from CHELSA, along with topographic data from EarthEnv. Using MaxEnt species distribution modelling algorithms, data were incorporated to identify areas which currently are or may become suitable for Lu. longipalpis. Ecological variables such as terrain ruggedness index, number of growing degree days at which mean daily air temperature is above >10 °C, Köppen-Geiger climate classification, and mean daily air temperature of the coldest quarter, were identified as drivers of suitability. Current regions of ecological suitability include areas from the southern United States to northern Argentina. Suitability may expand northward and increase within its current range, specifically in parts of Mexico and Brazil. Findings from this study identify climate and environmental variables impacting Lu. longipalpis distribution, and regions of potential range expansion.
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