Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Experimental setup of 25 bacterial strains placed on one TSA plate; plus one negative control (Bacillus subtilis 168;15) and one positive control (Serratia liquefaciens ATCC 27592; from12).