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EE Chapter 98 Antimicrobial Agents Q&A (1 OF 112) Sample Questions

1. Test shows a drug is resistant to Amoxicillin and Oxacillin but sensitive to Erythromycin, Vancomycin and some other penicillin. What kind of resistance is suspected?

A. Methicillin-Resistant Staphylococcus Aureus (MRSA)
B. Vancomycin-Resistant Enterococcus (VRE)
C. Multidrug-Resistant Mycobacterium Tuberculosis (MDR-TB)
D. Carbepenem-resistant Enterobacteriaceae (CRE) gut bacteria

Answer

Ans: A

Strategic thinking:
1. Read the question. You are asked to identify a specific antibiotic resistance.
2. Look for cues and keywords. There are multiple cues here: resistant to Amoxicillin and Oxacillin, sensitive to Erythromycin, Vancomycin and some other penicillin. Key phrase, suspected resistance, using your cues you can eliminate options B and D. Between A and C, be guided by the fact that Mycobacterium tuberculosis is not sensitive to cell-wall synthesis inhibitors that include the groups of penicillins and cephalosporins.
3. Thus, the correct answer is A.

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