All of the following antibacterial agents acts by inhibiting cell wall synthesis, except:: (A) Carbapenems, (B) Monobactams, (C) Cephamycins, (D) Nitrofurantation
Answer is D. Nitrofurantoin acts by generation of highly reactive intermediates which damage DNA. It does not inhibit cell wall synthesis. Ref: Essentials of Pharmacology by K D Tripathi, 5th Edition, Pages 628, 667; Antibiotic Manual: A Guide to Commonly Used Antimicrobials By David Schlossberg, Rafik Samuel, M.D., 2011, Page 310.