Table 2.
Comparison of Isolated Organisms Between Low-Procalcitonin (<0.5 µg/L, Group A) and High-Procalcitonin (≥0.5 µg/L, Group B) Patient Groups
| Organism, No. (%) | Group A (n = 125)a | Group B (n = 207)a | PCT Sensitivity, % |
|---|---|---|---|
| Gram(+) aerobe, any | 81 (64.8) | 105 (50.7) | 56.5 |
| Gram(-) aerobe, any | 43 (34.4) | 103 (49.8) | 70.1 |
| Staphylococcus aureus | 49 (39.2) | 44 (21.3) | 47.3 |
| MRSA | 20 (16.0) | 17 (8.2) | 45.9 |
| MSSA | 29 (23.2) | 27 (13.0) | 48.2 |
| Escherichia coli | 22 (17.6) | 62 (30.0) | 73.8 |
| Klebsiella species | 9 (7.2) | 14 (6.8) | 60.9 |
| Viridans streptococci/NVS | 9 (7.2) | 16 (7.7) | 64.0 |
| Streptococcus agalactiae | 8 (6.4) | 2 (1.0) | - |
| Enterococcus species | 4 (3.2) | 8 (3.9) | - |
| Streptococcus pyogenes | 4 (3.2) | 13 (6.3) | - |
| Staphylococcus, not aureus | 4 (3.2) | 5 (2.4) | - |
| Streptococcus pneumoniae | 3 (2.4) | 14 (6.8) | - |
| Haemophilus influenzae | 3 (2.4) | 1 (0.5) | - |
| Pseudomonas aeruginosa | 2 (1.6) | 10 (4.8) | - |
| Acinetobacter species | 2 (1.6) | 2 (1.0) | - |
| Anaerobe | 6 (4.8) | 13 (6.3) | - |
| Other gram(-) aerobe | 5 (4.0) | 14 (6.8) | - |
| Other gram(+) aerobe | 0 | 3 (1.4) | - |
Abbreviations: MRSA, methicillin-resistant Staphylococcus aureus; MSSA, methicillin-susceptible Staphylococcus aureus; NVS, nutritionally variant streptococci.
aPercentages may total >100% due to polymicrobial bacteremias.