CALIFORNIA – Have u ever guessed why some people are magnets for mosquitoes, while others rarely get bitten?
Here comes a new research which suggests that mosquitoes track down something to bite using a sequence of three cues: smell, then sight, and finally heat.
According to the new research published in the journal Current Biology, Biologists has recorded the movement of hungry mosquitoes inside a wind tunnel.
When an adult female mosquito needs a blood meal to feed her young, she searches for a host often a human. Many insects, mosquitoes included, are attracted by the odor of the carbon dioxide (CO2) gas that humans and other animals naturally exhale.
However, mosquitoes can also pick up other cues that signal a human is nearby. They use their vision to spot a host and thermal sensory information to detect body heat.
For example, if the insects were presented with a black spot in an otherwise empty wind tunnel, they left it alone. But if the CO2 plume was there as well, they would sniff it out and then head for the visual stimulus.
“They only pay attention to visual features after they detect an odour that indicates the presence of a host nearby,” said Dr Michael Dickinson, the study’s senior author.
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