Which of the following drugs are classified primarily as bacteriostatic rather than bactericidal except______________?
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Answer: D. Rifampin
Explanation
Rifampin is a bactericidal antibiotic that inhibits bacterial DNA-dependent RNA polymerase. Unlike bacteriostatic drugs that merely inhibit growth, bactericidal agents actively kill bacteria. It plays a crucial role in multidrug regimens for treating tuberculosis and severe infections. Bacteriostatic drugs halt bacterial replication and rely on host immunity to clear organisms. Bactericidal agents reduce bacterial viability directly without requiring active host immune responses. Rifampin penetrates intracellular compartments effectively to target persistent bacterial pathogens.
Tuberculosis treatment requires potent bactericidal drugs to eradicate slow-growing mycobacteria. Combining antimicrobial agents helps prevent the rapid emergence of resistant bacterial strains. Patient adherence to complex antibiotic schedules is vital for successful infection eradication. Sulphonamides act as bacteriostatic agents by inhibiting bacterial folic acid synthesis pathways. Chloramphenicol inhibits bacterial protein synthesis and functions primarily as a bacteriostatic drug. Ethambutol inhibits arabinosyl transferase and is classified as a bacteriostatic antimycobacterial agent.
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