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(Only female mosquitoes bite, as they rely on blood to nourish their eggs.) They disabled certain human-odor receptors on sensory neurons in the antennae of female Aedes aegypti mosquitoes. With this in mind, researchers used gene-editing technology in an attempt to prevent the pesky insects from sniffing out humans. Different kinds of these neurons can combine to identify more complex smells, but each neuron has only one receptor, corresponding to one particular scent. New research offers a possible explanation: Mosquitoes have a highly sophisticated olfactory system that gives them smelling superpowers, suggests a paper published last week in the journal Cell.įor decades, scientists believed that animals' sense of smell worked in a rather basic way: Information-carrying sensory neurons each pick up one specific odor and send that data to the brain. Anyone who’s ever felt the subtle sting of a mosquito bite and delivered a sharp slap to the affected area has probably wondered: How are mosquitoes so good at hunting down humans? The moment we step outside, it seems, they arrive en masse, ready to suck nutrient-rich blood from their next victim.
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