Table 2 Bacterial findings and contribution of different methods to diagnostic yield in the study population
Pathogen | No. (%) of patients with positive findings(n = 267) | Blood culture(n = 267) | Pleural fluid culture(n = 14) | Urinary antigen test(n = 262) | BAL(n = 8) | Sputum sample for culture and/orL. pneumophilaPCR(n = 165)a | NP swab culture(n = 263) | PCR | Serology(n = 263) | |
|---|---|---|---|---|---|---|---|---|---|---|
NP swab(n = 262)b | OP swab(n = 262)c | |||||||||
Streptococcus pneumoniae | 81 (30) | 21 | - | 24 | - | 4 | 10 | 6 | 16 | NA |
Bordetella pertussis | 15 (6) | NA | NA | NA | NA | NA | NA | - | - | 15 |
Haemophilus influenzae | 14 (5) | 1 | - | NA | - | 5 | 8 | NA | NA | NA |
Mycoplasma pneumoniae | 10 (4) | NA | NA | NA | NA | NA | NA | 7 | 1 | 2 |
Chlamydophila pneumoniae | 7 (3) | NA | NA | NA | NA | NA | NA | - | 2 | 5 |
Legionella pneumophila | 7 (3) | NA | NA | 7 | NA | - | NA | NA | NA | NA |
Enterobacteriaceae d | 6 (2) | 2 | - | NA | - | 3 | 1 | NA | NA | NA |
Moraxella catarrhalis | 5 (2) | - | - | NA | - | 2 | 3 | NA | NA | NA |
Miscellaneous e | 3 (1) | 1 | 1 | NA | - | - | 1 | NA | NA | NA |
Haemophilus parainfluenzae | 2 (1) | 1 | - | NA | - | 1 | - | NA | NA | NA |
Totalf | 126 (47) | 26 | 1 | 31 | - | 15 | 23 | 13 | 19 | 22 |