Bacteria in worms make a mosquito repellent that might beat DEET

An image, from a scanning electron micrograph, of <em>Heterorhabditis megidis</em> nematode worms (colored blue). These parasitic worms harbor a bacteria that repels mosquitoes.
An image, from a scanning electron micrograph, of Heterorhabditis megidis nematode worms (colored blue). These parasitic worms harbor a bacteria that repels mosquitoes.