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Furthermore, carbapenems are typically unaffected by emerging antibiotic resistance, even to other beta-lactams. [medical citation needed] Carbapenem antibiotics were originally developed at Merck & Co. from the carbapenem thienamycin, a naturally derived product of Streptomyces cattleya.
β-Lactam antibiotics (beta-lactam antibiotics) are antibiotics that contain a β-lactam ring in their chemical structure. This includes penicillin derivatives ( penams ), cephalosporins and cephamycins ( cephems ), monobactams , carbapenems [ 1 ] and carbacephems . [ 2 ]
(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.
Meropenem, sold under the brand name Merrem among others, is an intravenous carbapenem antibiotic used to treat a variety of bacterial infections. [3] Some of these include meningitis, intra-abdominal infection, pneumonia, sepsis, and anthrax.
In general, carbapenem, a β-lactam antibiotic, targets cells by inhibiting transpeptidases (penicillin-binding proteins). This prevents synthesis of peptidoglycan, a necessary structural component, leading to cell lysis. Resistance to carbapenem among Enterobacteriaceae and other gram-negative bacteria can be acquired through several mechanisms.
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 ...
Antibiotics with less reliable but occasional (depending on isolate and subspecies) activity: occasionally penicillins including penicillin, ampicillin and ampicillin-sulbactam, amoxicillin and amoxicillin-clavulnate, and piperacillin-tazobactam (not all vancomycin-resistant Enterococcus isolates are resistant to penicillin and ampicillin)
The carbapenems were developed to overcome antibiotic resistance mediated by bacterial beta-lactamase enzymes. However, the bla NDM-1 gene produces NDM-1, which is a carbapenemase beta-lactamase - an enzyme that hydrolyzes and inactivates these carbapenem antibiotics. [citation needed]
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