Recent research has uncovered that mosquitoes, particularly the Aedes aegypti species, can detect infrared radiation (IR) emitted from human skin to locate hosts more effectively. This discovery adds to their known use of carbon dioxide and scent to track down humans. The infrared detection is facilitated by heat-sensitive proteins like TRPA1, found at the tips of their antennae, which enable mosquitoes to sense the body heat from up to 2.5 feet away. This understanding could help improve mosquito control strategies, including more effective traps. It also highlights the benefits of wearing loose clothing, which blocks infrared radiation, making it harder for mosquitoes to detect humans.
Mosquitoes Use Infrared Detection to Track Human Hosts More Effectively
Researchers at UC Santa Barbara discovered that mosquitoes can detect infrared radiation from human body heat, enhancing their ability to locate hosts. This IR detection works in combination with other cues such as carbon dioxide and human odor. The study revealed that mosquitoes use specialized proteins, like TRPA1, in their antennae to sense thermal IR from up to 70 cm away, potentially improving mosquito control methods and explaining the efficacy of loose clothing in preventing bites.
https://news.ucsb.edu/2024/021587/mosquitoes-sense-infrared-body-heat-help-track-humans-down
Mosquitoes Use Infrared Radiation for Host-Seeking Navigation
Researchers have discovered that Aedes aegypti mosquitoes use infrared (IR) radiation from human body heat, along with carbon dioxide and odors, to effectively locate hosts. This IR detection is mediated by temperature-sensitive proteins like TRPA1 in the mosquito’s antennae. The ability to sense thermal radiation from distances up to 70 cm provides mosquitoes with a powerful advantage in tracking humans. Understanding this mechanism offers new strategies for developing more effective mosquito control measures.
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