regimens for endocarditis caused by these bacteria are generally based on high dosage of a beta-lactam antibiotic , penicillin in the case of streptococci and a penicillinase-resistant penicillin for staphylococcus aureus , with vancomycin substituted for beta-lactam resistant staphylococci , including coagulase-negative staphylococci .
C0030842
penicillin
C0282215
beta-lactam