title: Microbial degradation of cephalothin by cephalothin-susceptible Escherichia coli.
abstract: Cephalothin (CET)-susceptible Escherichia coli, which can degrade CET after prolonged incubation in broth containing a concentration of the drug greater than the minimum inhibitory concentration, was found in a clinical specimen. The substrate specificity of the partially purified enzyme to cephalosporin analogs strongly indicated the occurrence of CET-specific degradation. Nuclear magnetic resonance analysis of the degradation reaction demonstrated the appearance of two new signals attributed to deacetyl CET. This suggests the possibility of the presence of acylesterase.
mesh_terms: D002512:Cephalothin / Q000378:metabolism* / Q000494:pharmacology; D004926:Escherichia coli / Q000187:drug effects / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests
chemical_list: D002512:Cephalothin