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Cefalexin, also spelled cephalexin, is an antibiotic that can treat a number of bacterial infections. [4] It kills gram-positive and some gram-negative bacteria by disrupting the growth of the bacterial cell wall. [ 4 ]
Ceftaroline has also been described as "fifth-generation" cephalosporin, but does not have the activity against Pseudomonas aeruginosa or vancomycin-resistant enterococci that ceftobiprole has. [36] Ceftolozane is an option for the treatment of complicated intra-abdominal infections and complicated urinary tract infections.
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.
In the acidic conditions of the stomach, in vitro stability can be enhanced by the addition of an amino and a hydrogen to positions α1 and α2 of the cephalosporin structure. This results in a basic compound, an ammonium ion that is protonated in said conditions, giving us a more stable β-lactam which leads to an orally active drug.
The β-lactam core structures. (A) A penam.(B) A carbapenam.(C) An oxapenam.(D) A penem.(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.
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cephalexin – antibiotic, particularly useful for susceptible Staphylococcus infections; ciprofloxacin – antibiotic of quinolone group; clamoxyquine – antiparasitic to treat salmonids for infection with the myxozoan parasite, Myxobolus cerebralis; clavamox – antibiotic, used to treat skin and other infections