Table 1 Eleven (11) most commonly recovered species (constituting 94% of the tested population) by frequency extracted from the Merck ICU Surveillance Program from 1993 to 2004 (Total of all isolates: 74,394).
Organism | Number (%) | Cumulative frequency |
|---|---|---|
Pseudomonas aeruginosa | 16,482 (22) | 22.2% |
Escherichia coli | 13,961 (19) | 40.9% |
Klebsiella pneumoniae | 10,571 (14) | 55.1% |
Enterobacter cloacae | 6,779 (9) | 64.2% |
Acinetobacter spp. | 4,642 (6) | 70.5% |
Serratia marcescens | 4,112 (6) | 76.0% |
Enterobacter aerogenes | 3,307 (4) | 80.5% |
Stenotrophomonas maltophilia | 3217 (4) | 84.8% |
Proteus mirabilis | 3,011 (4) | 88.8% |
Klebsiella oxytoca | 2,018 (3) | 91.5% |
Citrobacter freundii | 1,483 (2) | 93.5% |