Odor-mediated response of gravid Aedes aegypti to mosquito-associated symbiotic bacteria

•Volatile organic compounds produced by Klebsiella sp. elicited oviposition and antennal responses in the arboviral vector Aedes aegypti.•A binary blend based on Klebsiella sp. odors was able to recapitulate the egg-laying responses of gravid mosquitoes.•The detection of Klebsiella sp. volatiles relies on the odorant receptor pathway since an orco mutant strain of Ae. aegypti lacked behavioral and physiological responses.•Bacteria-associated volatiles could be used to exploit mosquito behavior for population surveillance and vector control strategies.