Take a portion of a well isolated colony from each of the dishes and streak onto a filter paper moistened with the oxidase reagent or use commercially available test kits according to the recommendations of the supplier 用铂环或无菌吸管从接种盘上取一个隔离很好的菌落的一部分,并在已用氧化酶试剂浸湿过的滤纸上(或使用商业可直接使用的试剂片)划线。