Beta-Lactam Antibiotics - part 1 through slide 40 - Keshvara

Front

What is the structural feature that protects methicillin from nucleophilic attack by penicillinases?

Back

Methoxy groups.

Front

What does the variability in affinity for PBPs determine in beta-lactam antibiotics?

Back

Drug sensitivity of species.

Front

What is the role of beta-lactamase in bacterial resistance?

Back

It inactivates beta-lactams by reacting with the beta-lactam ring.

Front

Which cephalosporin is sometimes referred to as a 5th generation cephalosporin?

Back

Ceftaroline.

Front

Which bacteria is covered by natural penicillins?

Back

Streptococci.

Front

What is the mechanism of action of beta-lactam antibiotics?

Back

They inhibit bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs).

Front

What are penicillin-binding proteins (PBPs)?

Back

Enzymes located in the bacterial cell membrane that are essential for cell wall synthesis.

Front

What is the significance of the beta-lactam ring in beta-lactam antibiotics?

Back

It is crucial for the antibiotic's activity and is the target for beta-lactamase enzymes.

Front

How do methicillin and other beta-lactam antibiotics differ in their structure?

Back

Methicillin has a methoxy group that provides resistance to certain beta-lactamases.

Front

What is the primary use of cephalosporins in medicine?

Back

To treat a variety of bacterial infections, especially those resistant to penicillins.