Quality Control Was Performed to Determine the Validity of Urea

question 7

Multiple Choice

Quality control was performed to determine the validity of urea agar.S.multivorum and E.meningoseptica were used,which yielded positive for S.multivorum and negative for E.meningoseptica.Which one of the following statements explains this discrepancy?

• A)The urea agar is most likely expired.
• B)The pH is off on the urea agar.
• C)These two organisms are poor choices for quality control because they are both urea positive.
• D)No discrepancy is present;the results are valid.

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