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Similar to penicillins and cephalosporins, carbapenems are members of the beta-lactam antibiotics drug class, which kill bacteria by binding to penicillin-binding proteins, thus inhibiting bacterial cell wall synthesis. However, these agents individually exhibit a broader spectrum of activity compared to most cephalosporins and penicillins.
β-Lactam antibiotics are indicated for the prevention and treatment of bacterial infections caused by susceptible organisms. At first, β-lactam antibiotics were mainly active only against gram-positive bacteria, yet the recent development of broad-spectrum β-lactam antibiotics active against various gram-negative organisms has increased their usefulness.
Imipenem, a carbapenem. Imipenem has a sulfur atom that is not in the pentacyclic ring. Benzylpenicillin, a penicillin. The double bond is absent in the pentacyclic ring. Penem molecules do not occur naturally, and production of penems is an entirely synthetic process.
(E) A carbapenem. (F) A monobactam. (G) A cephem. (H) A carbacephem. (I) An oxacephem. This is a list of common β-lactam antibiotics—both administered drugs and those not in clinical use—organized by structural class. Antibiotics are listed alphabetically within their class or subclass by their nonproprietary name.
Beta-lactamases (β-lactamases) are enzymes (EC 3.5.2.6) produced by bacteria that provide multi-resistance to beta-lactam antibiotics such as penicillins, cephalosporins, cephamycins, monobactams and carbapenems , although carbapenems are relatively resistant to beta-lactamase.
Thienamycin was the first among the naturally occurring class of carbapenem antibiotics to be discovered and isolated. [3] Carbapenems are similar in structure to their antibiotic “cousins” the penicillins. Like penicillins, carbapenems contain a β-lactam ring (cyclic amide) fused to a five-membered ring. Carbapenems differ in structure ...
Like all carbapenem antibiotics, ertapenem has a broader spectrum of activity than other beta-lactams like penicillins and cephalosporins. Similar to doripenem, meropenem and biapenem, ertapenem has slightly better activity against many Gram-negative bacteria than other carbapenems such as imipenem.
Penicillin core structure. The β-lactam ring is part of the core structure of several antibiotic families, the principal ones being the penicillins, cephalosporins, carbapenems, and monobactams, which are, therefore, also called β-lactam antibiotics. Nearly all of these antibiotics work by inhibiting bacterial cell wall biosynthesis.
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