cefetamet and Pneumococcal-Infections

MICs of 21 beta-lactams were determined by agar dilution against 283 penicillin-susceptible (pen-S), 122 intermediate (pen-I) and 23 fully penicillin-resistant (pen-R) pneumococci. MICs of all beta-lactams increased with increasing MICs of penicillin. Clometocillin was the most active penicillin against pen-I or pen-R pneumococci. All oral cephalosporins except cefuroxime and cefpodoxime were less active than penicillin and none was satisfactory against pen-I or pen-R pneumococci. The parenteral third- and fourth-generation cephalosporins (except ceftazidime) were similar in activity to penicillin against pen-S isolates. Cefpirome showed the lowest mean MICs against pen-I and pen-R strains.

Topics: Amoxicillin; Ampicillin; Anti-Bacterial Agents; beta-Lactams; Carbapenems; Cefaclor; Cefadroxil; Cefatrizine; Cefepime; Cefixime; Cefotaxime; Cefpirome; Cefpodoxime; Ceftazidime; Ceftibuten; Ceftizoxime; Ceftriaxone; Cefuroxime; Cephalosporins; Cephradine; Drug Resistance, Microbial; Drug Resistance, Multiple; Humans; Microbial Sensitivity Tests; Penicillin Resistance; Penicillins; Piperacillin; Pneumococcal Infections; Serotyping; Species Specificity; Streptococcus pneumoniae