If you tested a 2nd strain of S.aureus with the same method and concentrations of drugs as indicated in Table 20.2,but you found that the zone of inhibition caused by drug D had dropped to 2 mm,what does this indicate?

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Quizplus · Accepted Answer

A decrease in the zone of inhibition indicates that the bacteria is less sensitive to the antibiotic, or possibly even resistant to it. In this case, the zone of inhibition caused by drug D has dropped to 2 mm, indicating that the 2nd strain of S. aureus is likely resistant to drug D.

If You Tested a 2nd Strain of S