| cephamycins | <pharmacology> Naturally produced family of beta-lactam cephalosporin-type antibiotics having a 7-methoxy group and possessing marked resistance to the action of beta-lactamases from gram-positive and gram-negative organisms. (12 Dec 1998) |
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Synonyms : Cephamycin Antibiotics
| cephamycin |
any of a family of naturally occurring antibacterial antibiotics derived from various species of Streptomyces or produced semisynthetically, which are resistant to degradation by β-lactamase. Semisynthetic cephamycins, derived from cephamycin C, are generally classed as second-generation cephalosporins, but have greater activity against anaerobic bacteria.
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