TABLE 1.
Results for the 11,156 blood cultures
| Group and microorganism | No. of samples | % of total |
|---|---|---|
| Gram-positive bacteria | ||
| Coagulase-negative Staphylococcus spp. | 900 | 24.48 |
| Staphylococcus aureus | 465 | 12.65 |
| Streptococcus pyogenes | 26 | 0.71 |
| Streptococcus pneumoniae | 24 | 0.65 |
| Streptococcus agalactiae | 10 | 0.27 |
| Streptococcus spp. (viridans group) | 36 | 0.98 |
| Enterococcus faecalis | 31 | 0.84 |
| Enterococcus faecium | 18 | 0.49 |
| All gram-positive bacteria | 1,510 | 41.07a |
| Enterobacteriaceae | 1,067 | 29.03 |
| Klebsiella pneumoniae | 431 | 11.72 |
| Escherichia coli | 172 | 4.68 |
| Serratia marcescens | 94 | 2.55 |
| Enterobacter aerogenes | 88 | 2.39 |
| Klebsiella oxytoca | 85 | 2.31 |
| Enterobacter cloacae | 77 | 2.09 |
| Edwardsiella ictaluri | 41 | 1.11 |
| Salmonella spp. | 36 | 0.98 |
| Proteus spp. | 17 | 0.46 |
| Enterobacter agglomerans | 11 | 0.29 |
| Alcaligenes spp. | 9 | 0.24 |
| Morganella morganii | 2 | 0.05 |
| Citrobacter freundii | 4 | 0.10 |
| Other gram-negative bacteria | ||
| Pseudomonas aeruginosa | 320 | 8.71 |
| Stenotrophomonas maltophilia | 76 | 2.06 |
| Acinetobacter baumanii | 146 | 3.97 |
| Acinetobacter lwoffii | 21 | 0.57 |
| Brucella melitensis | 20 | 0.54 |
| All gram-negative bacteria | 1,650 | 44.88a |
| Yeasts | ||
| Candida albicans | 237 | 6.45 |
| Candida glabrata | 121 | 3.29 |
| Candida tropicalis | 56 | 1.52 |
| Candida parapsilosis | 55 | 1.49 |
| Candida kefyr | 37 | 1.01 |
| Candida krusei | 10 | 0.27 |
| All yeasts | 516 | 14.03a |
| Contaminants | 233 | 2.08b |
| False-positive | 35 | 0.3b |
| False-negative | 12 | 0.1b |
| No growth | 7,235 | 64.85b |
a
Total, 3,676 specimens.
b
Total, 11,156 specimens.