PT  - JOURNAL ARTICLE
AU  - Knapp, Cynthia C.
AU  - Washington, John A.
TI  - Comparative activity of newer antibiotics against gram-negative bacilli
DP  - 1989 Mar 01
TA  - Cleveland Clinic Journal of Medicine
PG  - 161--166
VI  - 56
IP  - 2
4099  - http://www.ccjm.org/content/56/2/161.short
4100  - http://www.ccjm.org/content/56/2/161.full
SO  - Cleve Clin J Med1989 Mar 01; 56
AB  - The in vitro activities of cefoperazone, cefotaxime, ceftriaxone, ceftazidime, azlocillin, mezlocillin, piperacillin, ticarcillin/clavulanate, aztreonam, imipenem, and ciprofloxacin were concurrently determined against over 1,000 isolates of gram-negative bacilli from clinical specimens of patients at the Cleve-land Clinic. Cephalosporins, penicillins, and aztreonam were active against species of Enterobacteriaceae other than Citrobacter freundii, Enterobacter aerogenes, and Enterobacter cloacae. Ceftazidime was the most active cephalosporin against Pseudomonas aeruginosa. Against the Enterobacteriaceae, the rank order of activity of penicillins was ticarcillin/clavulanate > piperacillin > mezlocillin > azlocillin. Against P. aer-uginosa, the rank order of activity of penicillins was piperacillin > ticarcillin/clavulanate > azlocillin > mezlocillin. Aztreonam was less active v P. aeruginosa than ceftazidime, cefoperazone, or piperacillin. The most active antimicrobials against all isolates tested were imipenem and ciprofloxacin.