Penicillinase Penicillin-resistant Streptococcus

Benzylpenicillin or penicillin G has a narrow antimicrobial spectrum. It is active with respect to Gram-positive bacteria (staphylococcus, streptococcus, and pneumococci), causative agent of diphtheria, and anthrax bacillus. Gram-negative bacteria are resistant to it. Benzylpenicillin is broken down by stomach acid and destroyed by staphylococcus penicillinase. 

Cellulitis S aureus, group A streptococcus Penicillinase-resistant penicillin, cephalosporin (first-generation)2 Vancomycin, clindamycin, linezolid, daptomycin... 

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