TABLE 4.

Longitudinal increase in multidrug resistance

Organism19932004
No. of MDR isolates/total no. of isolatesa% of MDR isolatesNo. of MDR isolates/total no. of isolates% of MDR isolates
Pseudomonas aeruginosa13/7691.793/1,0049.3
Escherichia coli0/724016/8082.0
Klebsiella pneumoniae26/5135.184/63313.3
Enterobacter cloacae13/3973.324/4065.9
Acinetobacter spp.19/2856.7101/33829.9
Enterobacter aerogenes6/2132.80/1540
Proteus mirabilis1/1740.61/1420.7
Citrobacter freundii5/955.37/6311.1
  • a Multidrug resistances is defined here as being resistant to one or more extended-generation cephalosporins (ceftazidime, ceftriaxone, or cefotaxime), one or more aminoglycosides (amikacin or tobramycin), and the fluoroquinolone ciprofloxacin. MDR, multidrug resistant.