TOPICS: Penicillin, beta lactam rings, pbp, penicillin binding proteins, cell wall cross linking, peptidoglycan, resistance, beta lactamases, syphilis, actinomyces, neisseria meningitidis, strep agalactiae, intrapartum period, rheumatic fever, strep pyogenes, m protein, strep pharyngitis, strep pneumoniae, hypersensitivity, autoimmune hemolytic anemia, allergic reactions, acute interstitial nephritis, serum sickness, stevens johnson syndrome