Susceptibilities of 177 penicillin-susceptible and -resistant pneumococci to FK 037, cefpirome, cefepime, ceftriaxone, cefotaxime, ceftazidime, imipenem, biapenem, meropenem, and vancomycin.
MICs of six extended-spectrum cephalosporins (cefotaxime, ceftriaxone, ceftazidime, FK 037, cefpirome, cefepime), three carbapenems (imipenem, meropenem, biapenem), and vancomycin for 49 penicillin-susceptible (S), 77 penicillin intermediate-resistant (I), and 51 penicillin-resistant (R) pneumococci were determined by agar dilution. Compared with ceftazidime (MICs for 90% of strains tested [MIC90s] of 2.0, 16.0, and 16.0 micrograms/ml for S, I, and R strains, respectively), all other cephalosporins yielded lower MICs (MIC90s of 0.06 to 0.125, 0.5 to 1.0, and 1.0 to 2.0 micrograms/ml against S, I, and R strains, respectively). All three carbapenems were very active, with MIC90s, even for R strains, of < or = 1.0 micrograms/ml. All strains were susceptible to vancomycin (MIC90 of 0.5 micrograms/ml).
Department of Pathology (Clinical Microbiology), Hershey Medical Center, Pennsylvania 17033.
S K
SK
Spangler
M R
MR
Jacobs
P C
PC
Appelbaum
D002511:Cephalosporins / Q000494:pharmacology*; D006801:Humans; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance; D011008:Pneumococcal Infections / Q000382:microbiology; D013296:Streptococcus pneumoniae / Q000187:drug effects*; D014640:Vancomycin / Q000494:pharmacology*; D065093:beta-Lactamase Inhibitors
D002511:Cephalosporins; D065093:beta-Lactamase Inhibitors; D014640:Vancomycin