Table 1.
Pneumococcal serotypes of 49 cases of pneumonia with pleural effusion as determined by multiplex immunoassay directly on pleural fluids
| Serotype | No. of positive samples | No. of positive samples confirmed by isolation of S. pneumoniae from pleural fluidb |
|---|---|---|
| 3 | 13 | 2 |
| 19A | 11 (7 + 4)a | |
| 7F/A | 7 | 1 |
| 1 | 6 | 1 |
| 6B | 1 | 1 |
| 8 | 1 | |
| 33F/A | 1 | |
| Nontypeable | 9 (13 − 4)a | |
| Total | 49 |
a
Four samples contained nondetectable amounts of capsular PS but were found to contain DNA of serotype 19A capsule synthesis gene locus by PCR.
b
Serotyping results of all 5 available isolates agreed with direct typing results of pleural fluids.