All of the following statements regarding aminoglycosides are true except______________?
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Answer: A. Are bacteriostatic
Explanation
Aminoglycosides function as bactericidal antibiotics that actively kill susceptible bacterial pathogens. Inhibiting bacterial protein synthesis through ribosomal binding leads to irreversible cell death. Labeling aminoglycosides as bacteriostatic contradicts their well-established bactericidal mechanism of action. Aminoglycoside antibiotics include agents like gentamicin, tobramycin, and streptomycin for severe infections. They require active transport across bacterial cell membranes, a process enhanced by cell wall inhibitors. Significant toxicities include nephrotoxicity and ototoxicity during prolonged systemic administration regimens.
Clinicians reserve aminoglycosides for serious gram-negative bacillary infections requiring potent bactericidal action. Peak and trough blood levels are monitored closely to prevent permanent kidney and inner ear damage. Understanding bactericidal properties helps physicians design effective combination antimicrobial therapy protocols. Extracellular distribution is a true pharmacokinetic property of hydrophilic aminoglycoside molecules. Renal excretion of unchanged drug molecules represents the primary clearance route for aminoglycosides. Teratogenic risks are documented for aminoglycosides, making fetal exposure a significant clinical concern.
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