What class of antibiotics are cephalosporins and how do they relate to penicillin?

Explore the USMLE Step 3 Drug MOA Test. Use flashcards and multiple-choice questions, each with hints and explanations. Ace your exam with confidence!

Cephalosporins are classified as beta-lactam antibiotics, which are characterized by their beta-lactam ring structure that is essential for their antibacterial activity. They share this structural feature with penicillins, which is why they are often grouped together under the broader category of beta-lactams.

The mechanism of action for both cephalosporins and penicillins involves inhibiting bacterial cell wall synthesis. They achieve this by binding to and inactivating penicillin-binding proteins (PBPs), which play a crucial role in the formation of the bacterial cell wall. As a result, this leads to cell lysis and ultimately, bacterial death.

Cephalosporins have a distinct advantage over some penicillins since they exhibit varying degrees of resistance to penicillinase (also known as beta-lactamase), which are enzymes produced by certain bacteria that confer resistance to penicillin antibiotics. While early generation cephalosporins are often susceptible to these enzymes, many later generation cephalosporins have been developed to be more resilient against them, allowing for better efficacy against bacteria that produce penicillinase.

In summary, cephalosporins belong to the beta-lactam class of antibiotics and show

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy