Many of this disinfectants tested will produce zones of inhibition around the colonies. In some area

Many of this disinfectants tested will produce zones of inhibition around the colonies. In some areas, a sample taken from under from under a disk with a definite zone will grow when place in thioglycollate broth, in other cases it will not grow. How would you explain these two different effects?On a test plate inoculated with an organism such as a staphylococcus recently isolated from an infection, a few colonies may appear within a clear zone of inhibition. Why would these colonies be present? What would their growth indicate about the probably effectiveness of the antibiotic in controlling infection?