title: Evolution of extended spectrum cephalosporin resistance in the pneumococcus.
authors.forename: H J
authors.initials: HJ
authors.lastname: Koornhof
authors.forename: K P
authors.initials: KP
authors.lastname: Klugman
mesh_terms: D002439:Cefotaxime / Q000494:pharmacology; D002443:Ceftriaxone / Q000494:pharmacology; D002511:Cephalosporins / Q000494:pharmacology*; D004352:Drug Resistance, Microbial; D015378:Imipenem / Q000494:pharmacology; D010403:Penicillin Resistance; D013296:Streptococcus pneumoniae / Q000187:drug effects*; D013845:Thienamycins / Q000494:pharmacology*
chemical_list: D002511:Cephalosporins; D013845:Thienamycins; D015378:Imipenem; D002443:Ceftriaxone; D002439:Cefotaxime