Thursday, July 7, 2011

Antimicrobials

Major groups

  • Cell wall
    • Pre-production -- bacitracin (subunit production & transport)
    • Production -- vancomycin (elongation)
    • Post-production -- beta-lactam (disrupt crosslinks); polymyxin B, collistin (detergent)
  • Nucleic acid inhibitors
    • NA metabolism -- trimethoprim, sulfadiazine/sulfonamide (antifolates); metronidazole, nitrofurantoin (anaerobic DNA inhibitor)
    • DNA replication -- quinolones
    • RNA synthesis -- rifampicin/rifamycin
  • Protein synthesis
    • 30S -- aminoglycosides (initiation); tetracycline (tRNA)
    • 50S -- linezolid (initiation); chloramphenicol (peptidyl transferase); macrolides, clindamycin (transpeptidation/translocation)
    • Elongation factor -- fusidic acid
    • tRNA -- mupirocin (tRNA-ligase inhibitor)


Bacteriostatic -- erythromycin, clindamycin, SMX/TMP, tetracycline, chloramphenical (ECSTaTiC; credit -- USMLE Step 1 First Aid)

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