The Mosquito may be tiny, but it is one of the deadliest creatures on Earth, responsible for nearly 600,000 deaths annually due to disease transmission.
Mosquitoes feed on human blood and, in the process, transmit dangerous illnesses such as Malaria, Dengue Fever, West Nile Virus, Yellow Fever, and Zika Virus.
A recent international study has revealed fascinating insights into when mosquitoes first began feeding on humans. Scientists analyzed the DNA of mosquito species to trace their evolutionary history.
The findings suggest that mosquitoes initially shifted to feeding on humans in the forests of Southeast Asia. Before this transition, they primarily fed on animals and primates.
The research focused on species belonging to the Anopheles leucosphyrus group, known for spreading malaria. Scientists examined 11 mosquito species collected between 1992 and 2020 and used computational models to study genetic changes.
The study found that as human populations increased, mosquitoes evolved specialized receptors that allowed them to detect humans more efficiently, marking a key evolutionary shift.
Earlier research estimated that mosquitoes began biting humans between 61,000 and 500,000 years ago. However, the new study suggests that human-mosquito interaction may date back as far as 1.8 million years, indicating a much older relationship.
Today, there are around 3,500 mosquito species worldwide, though only a small number are responsible for spreading deadly diseases. Their saliva contains chemicals that help them evade the human immune system, making them highly effective disease carriers.
