[Drug resistance mechanism of gram negative bacilli].
D002511:Cephalosporins / Q000494:pharmacology; D004755:Enterobacteriaceae / Q000187:drug effects; D006801:Humans; D010403:Penicillin Resistance; D010406:Penicillins / Q000494:pharmacology; D011549:Pseudomonas / Q000187:drug effects
D002511:Cephalosporins; D010406:Penicillins