This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
A patient needs antibiotic treatment for Aificial valve, culture positive infective entercoccal endocarditis. His medical history include several anaphylactic reaction to penicillin G during the past year. The best approach would be treatment with 
Select and explain. 
A. Amoxicillin clavulanic acid, B. Aztreonam, C. Cefazolin plus gentamicin, D. Vancomycin
D: Vancomycin
Answer: D: Vancomycin 
Explanation: Ref-KDT 6/e 732 * Severe allergy to penicillins rule out the use of amoxicillin and cefazolin. * Vancomycin is highly effective against MRSA and enterococcal intections. * Drugs for VRSA and VRE (Vancomvcin Resistant enterococcus faecalis) include linezolid and daptomycin.