Initial microbiology in patients with pneumonia (n=70); n (% out of 70)
| Mild; n=33 | Moderate; n=24 | Severe; n=13 | p value | |
| H1N1 Influenza | 10(30) | 6(25) | 8(62) | 0.07 |
| Cytomegalo virus | 1(3) | 6(25) | 0 | 0.01 |
| Staphylococcus aureus | 0 | 1(4) | 0 | 0.38 |
| Streptococcus pneumonia | 0 | 0 | 1(8) | 0.11 |
| Escherichia coli | 1(3) | 2(8) | 0 | 0.43 |
| Klebsiella spp. | 2(6) | 1(4) | 0 | 0.66 |
| Pseudomonas aeruginosa | 4(12) | 2(8) | 1(8) | 0.85 |
| Acinetobacter baumannii | 1(3) | 3(13) | 1(8) | 0.39 |
| Strenotrophomonas maltophilia | 1(3) | 0 | 1(8) | 0.41 |
| Candida albicans | 0 | 2(14) | 0 | 0.14 |
| Candida tropicalis | 0 | 1(4) | 0 | 0.38 |
| None found | 14(42) | 5(21) | 1(8) | 0.04 |