After incubation examine the VRBG dishes for characteristic dark purple colonies which are usually surrounded by a purple halo (precipitate).
After incubation examine the VRBG dishes for characteristic dark purple colonies which are usually surrounded by a purple halo (precipitate).
培养后检查VRBG平板，特征菌为紫黑色并环绕紫色光环（有沉淀物）。