Human-Encroachment Spurs Mosquito Evolution in Brazil's Atlantic Forest

A study in Brazil's Atlantic Forest reveals that biodiversity loss is shifting mosquitoes' feeding habits toward human blood. Researchers found that, alongside human expansion and deforestation, mosquitoes are increasingly preying on humans due to reduced natural hosts, potentially raising disease transmission risks.

Recent research conducted in Brazil's Atlantic Forest points to a concerning trend: the ongoing loss of biodiversity is driving mosquitoes, which once sought out a variety of hosts, to start preferring human blood.

This vast forest, a globally recognized biodiversity hotspot spanning the Atlantic coast of Brazil and stretching into Paraguay and Argentina, is home to thousands of unique plant and animal species.

However, only about 30% of its original territory remains due to human expansion, and this shift is driving mosquitoes to seek humans as newfound hosts, creating heightened risks for pathogen spread.