title: A new test method for demonstrating beta-lactamase activity among mycobacteria and nocardia.
mesh_terms: D001681:Biological Assay; D002511:Cephalosporins / Q000494:pharmacology; D008722:Methods; D009161:Mycobacterium / Q000145:classification / Q000201:enzymology*; D009615:Nocardia / Q000145:classification / Q000201:enzymology*; D010405:Penicillinase / Q000378:metabolism*
chemical_list: D002511:Cephalosporins; D010405:Penicillinase