Gravid Aedes are attracted to odorants from organic infusions made from bamboo leaves. Bacteria were cultured from bamboo leaf infusions and identified through sequencing of small-subunit ribosomal coding regions of PCR amplicons. The attraction of gravid mosquitoes to these bacterial species was evaluated in behavioral bioassays using single species or mixed species isolates over a wide range of cell densities. Overall, mosquito response to the isolates varied with some bacterial isolates being highly attractive while other isolates were repellent. The two mosquito species often exhibited markedly different responses to the same bacterial isolates. For both mosquito species greatest attraction occurred when gravids were presented with a mixture of bacterial isolates.