Color Atlas of Pharmacology (Part 23): Antibacterial Drugs

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Color Atlas of Pharmacology (Part 23): Antibacterial Drugs

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Antibacterial Drugs can be classified according to their respective primary mode of action (color tone in 2 and 3). When bacterial growth remains unaffected by an antibacterial drug, bacterial resistance is present. This may occur because of certain metabolic characteristics that confer a natural insensitivity to the drug on a particular strain of bacteria (natural resistance). Depending on whether a drug affects only a few or numerous types of bacteria, the terms narrow-spectrum (e.g., penicillin G) or broad-spectrum (e.g., tetracyclines) antibiotic are applied. Naturally susceptible bacterial strains can be transformed under the influence of antibacterial drugs into resistant ones (acquired...

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