BSCI 424 — PATHOGENIC MICROBIOLOGY — Fall 2000


Physiological and Biochemical Mechanisms of Drug Resistance


Bacteria may Demonstrate any of Five General Mechanisms of Antibiotic Resistance:

    1. Lack of entry; Decreased cell permeability
    2. Greater exit; Active efflux
    3. Enzymatic inactivation of the antibiotic
    4. Altered target; Modification of drug receptor site
    5. Synthesis of resistant metabolic pathway

These Mechanisms can be Grouped into Three Broad Categories:

Permeability Mechanisms

Lack of entry; Decreased cell permeability

Greater exit; Active efflux

Enzymatic Inactivation of the Antibiotic Altered Target or Pathway

Altered target; Modification of drug receptor site

Synthesis of resistant metabolic pathway

 

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Revised: August 2000
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