Table 3.
Microbiological etiology by severity of community-acquired pneumonia (CAP)
| Severe CAP (n = 50) |
Non-severe CAP (n = 44) |
All patients (n = 94) |
|||
|---|---|---|---|---|---|
| Blood or Pleural fluid | Sputum | Total | |||
| Positive blood culture | 12 (24) | 2 (4.5) | 14 (14.9) | – | 14 (14.9) |
| Etiological diagnosis | 28 (56) | 15 (34.1) | 15 (16) | 28 (29.8) | 43 (45.8) |
| Streptococcus pneumoniae | 2 (7.1) | 0 | 2 (13.3) | 0 | 2 (4.6) |
| Other Streptococcus spp. | 3 (10.7) | 1(6.7) | 4 (26.7) | 0 | 4 (9.3) |
| Staphylococcus aureus | 5 (17.9) | 3 (20) | 3 (20) | 5 (17.9) | 8 (18.6) |
| Haemophilus influenzae | 0 | 2 (13.3) | 0 | 2 (7.1) | 2 (4.6) |
| Moraxella catarrhalis | 2 (7.1) | 0 | 0 | 2 (7.1) | 2 (4.6) |
| Enterobacteriaceae: | 6 (21.4) | 4 (26.7) | 3 (20) | 7 (25) | 10 (23.3) |
| Klebsiella pneumoniae | 5 (17.9) | 2 (13.3) | 2 (13.3) | 5 (17.9) | 7 (16.3) |
| Escherichia coli | 1 (3.6) | 0 | 1 (6.7) | 0 | 1 (2.3) |
| Others | 0 | 2 (13.3) | 0 | 2 (7.1) | 2 (4.6) |
| Pasteurella spp. | 1 (3.6) | 0 | 1 (6.7) | 0 | 1 (2.3) |
| Potentially drug-resistant bacteria: | 13 (46.4) | 8 (53.3) | 2 (13.3) | 19 (67.9) | 21 (48.8) |
| Pseudomonas aeruginosa | 5 (17.9) | 3 (20) | 0 | 8 (28.6) | 8 (18.6) |
| ESBL-positive Enterobacteriaceae* | 4 (14.3) | 1 (6.7) | 1 (6.7) | 4 (14.3) | 5 (11.6) |
| Acinetobacter spp. | 2 (7.1) | 4 (26.7) | 1 (6.7) | 5 (17.9) | 6 (13.9) |
| Stenotrophomonas maltophilia | 0 | 1 (6.7) | 0 | 1 (3.6) | 1 (2.3) |
| Methicillin resistant Staphylococcus aureus | 3 (10.7) | 1 (6.7) | 0 | 4 (14.3) | 4 (9.3) |
| Polymicrobials | 4 (14.3) | 5 (33.3) | 0 | 9 (32.1) | 9 (20.9) |
Data are presented as n (%). *ESBL: extended spectrum beta-lactamase