Chapter 12, Episode 50

This episode introduces the principles of antimicrobial therapy, focusing on the goal of selective toxicity. It reviews key concepts like bactericidal vs. bacteriostatic drugs, broad vs. narrow spectrum, and the major targets of antimicrobial drugs (cell wall, protein synthesis, nucleic acids, membranes, and metabolism). It also explains how clinicians choose appropriate treatments using tools like the Kirby-Bauer test and MIC, and highlights important considerations such as toxicity, allergic reactions, superinfections (like C. difficile), and the therapeutic index.