title: Demonstration of inducible beta-lactamase in gram-negative organisms.
mesh_terms: D002440:Cefoxitin / Q000494:pharmacology; D004790:Enzyme Induction / Q000187:drug effects; D006090:Gram-Negative Bacteria / Q000187:drug effects / Q000201:enzymology*; D008826:Microbial Sensitivity Tests; D010878:Piperacillin / Q000494:pharmacology; D001618:beta-Lactamases / Q000096:biosynthesis*
chemical_list: D002440:Cefoxitin; D001618:beta-Lactamases; D010878:Piperacillin