Antimicrobial activity of 15 drugs against the six most frequently isolated gram-negative (5,847 strains) from the 1997 SENTRY Antimicrobial Surveillance Program.
Pseudomonas Acinetobacter Escherichia Klebsiella Enterobacter Serratia
aeruginosa species coli species spec ies marcescens
(n = 1,135) (n = 224) (n = 2,527) (n = 1,089) (n = 647) (n = 225)
Antimicrobial % resistant % resistant % resistant % resistant % resistant % resistant
Cefepime 9.7 17.4 0.0 0.6 0.5 4.0
Ceftazidime 12.8 17.0 1.0/3.0* 2.9/5.9* 21.6 6.7
Piperacillin/ 9.3 13.9 2.5 4.4 10.8 11.1
Imipenem 8.3 3.6 0.1 0.2 0.5 2.2
Gentamicin 11.9 22.3 2.9 2.8 5.6 7.1
Ciprofloxacin 13.3 24.1 2.1 2.7 4.3 7.1