Development of staphylococci cross-resistant to cephalexin and methicillin.
D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002511:Cephalosporins / Q000494:pharmacology*; D008712:Methicillin / Q000494:pharmacology*; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance; D013210:Staphylococcus / Q000187:drug effects*