Pathogen | Percentage of Isolates 1986-1989 (N = 16,727) | Percentage of Isolates 1990-1996 (N = 17,671) |
Staphylococcus aureus | 17 | 20 |
Coagulase-negative Staphylococci | 12 | 14 |
Enterococcus spp. | 13 | 12 |
Escherichia coli | 10 | 8 |
Pseudomonas aeruginosa | 8 | 8 |
Enterobacter spp. | 8 | 7 |
Proteus mirabilis | 4 | 3 |
Klebsiella pneumoniae | 3 | 3 |
Other Streptococcus spp. | 3 | 3 |
Candida albicans | 2 | 3 |
Group D streptococci (non-enterococci) | - | 2 |
Other gram-positive aerobes | - | 2 |
Bacteroides fragilis | - | 2 |