Deforestation Pushes Mosquitoes Toward Humans for Blood

A Frontiers in Ecology and Evolution study in Rio de Janeiro’s Atlantic Forest remnants shows mosquitoes feeding on humans more often than on other animals, likely because biodiversity loss reduces alternative hosts. From 1,714 mosquitoes across 52 species, 24 blood meals were identified, with 18 traced to humans. The findings suggest that host availability and proximity drive this shift, increasing the risk of pathogen transmission (dengue, Zika, Yellow Fever, Mayaro, Chikungunya) and underscoring the need for targeted surveillance and ecosystem-aware disease control.