Table 6.
Diagnostic yield (sensitivity) of different techniques used to detect 59 cases of community acquired pneumonia by Streptococcus pneumoniae (Sp) in 525 children and adolescents
| mPCR in induced sputum N = 525 |
Culture in induced Sputuma N = 357/465 |
Compatible Gram stain in good/intermediate induced sputum N = 339/465 | Urinary antigen n = 514 |
Blood culture N = 411 |
Culture in Pleural effusion N = 14 |
Positive Results for S. pneumoniae |
|---|---|---|---|---|---|---|
| + | – | + | + | – | – | 13 |
| + | + | – | – | – | – | 23 |
| – | – | + | + | – | – | 3 |
| + | + | – | + | – | – | 4 |
| + | + | + | + | – | – | 3 |
| + | + | + | – | – | – | 2 |
| – | – | – | + | + | – | 2 |
| + | – | – | – | + | – | 2 |
| + | – | – | + | + | + | 2 |
| – | + | – | – | – | – | 1 |
| – | + | – | + | – | – | 1 |
| + | – | – | + | + | – | 1 |
| + | – | – | – | + | + | 1 |
| + | + | + | – | – | + | 1 |
| 52 (88.1%) | 35 (59.3%) | 22 (37.3%) | 29 (49.2%) | 8 (13.6%) | 4 (6.8%) | 59 |
aDetection of S. pneumoniae by culture in induced sputum of good/intermediate quality with predominance of bacterial shapes compatibles with the Gram stain (gram-positive diplococci or gram-positive cocci)