This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
A diabetic patient developed cellulitis due to S.aureus, which was found to be methicillin re-
sistant on the antibiotic sensitivity testing. All the following antibiotics will be appropriate except: 
Select and explain. 
A. Vancomycin, B. Imipenem, C. Teichoplanin, D. Linezolid
B: Imipenem
Answer: B: Imipenem 
Explanation: “Imipenam is not effective against Enterococcus faecium, MRSA, Clostridium difficle, Burkholderia cepacia as they produce metallobetalactmases"
TREATMENT OF MRSA