Table 3 Microbiological etiology by severity of community-acquired pneumonia (CAP)
|  | Severe CAP (n = 50) | Non-severe CAP (n = 44) | All patients (n = 94) | ||
|---|---|---|---|---|---|
| Â | Â | 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) |