What mechanism does vancomycin use to exert its antibiotic effect?

• A. Inhibit protein synthesis
• B. Inhibit bacterial cell wall synthesis
• C. Inhibit DNA replication
• D. Disrupt metabolic pathways

Answer: (B)

Vancomycin exerts its antibiotic effect primarily by inhibiting bacterial cell wall synthesis. This is achieved by binding to specific components of the cell wall precursors, which prevents their incorporation into the growing cell wall structure. By doing so, vancomycin disrupts the integrity of the cell wall, ultimately leading to cell lysis and death, particularly in Gram-positive bacteria.

This mechanism of action is especially crucial for fighting infections caused by resistant bacteria such as methicillin-resistant Staphylococcus aureus (MRSA). The inability of bacteria to properly form their protective cell wall directly correlates with their susceptibility to vancomycin, making it a vital antibiotic in the treatment of serious bacterial infections.