Table 2.
Sensitivity and specificity of S. suis serotype 2 PCR on culture-confirmed CSF samples, retrospective study (A) and prospective study (B)
| A. | No. of samples | PCR positive | PCR negative |
|---|---|---|---|
| S. suis serotype 2 | 114 | 114 | 0 |
| S. suis serotype 14 | 1 | 0 | 1 |
| N. meningitidis | 11 | 0 | 11 |
| Neisseria species | 1 | 0 | 1 |
| S. pneumoniae | 50 | 0 | 50 |
| H. influenzae | 5 | 0 | 5 |
| Streptococcus bovis | 2 | 0 | 2 |
| Streptococcus agalactiae | 1 | 0 | 1 |
| Streptococci, viridans group | 6 | 0 | 6 |
| Staphylococcus aureus | 2 | 0 | 2 |
| Escherichia coli | 8 | 0 | 8 |
| Klebsiella pneumoniae | 10 | 0 | 10 |
| Proteus mirabilis | 1 | 0 | 1 |
| Pseudomonas aeruginosa | 1 | 0 | 1 |
| Total | 213 | 114 | 99 |
| B. | No. of samples | No. of PCR positive | No. of PCR negative |
|---|---|---|---|
| S. suis serotype 2 | 55 | 55 | 0 |
| S. suis serotype 14 | 2 | 0 | 2 |
| S. suis, untypeable | 1 | 0 | 1 |
| N. meningitidis | 4 | 0 | 4 |
| S. pneumoniae | 16 | 0 | 16 |
| H. influenzae | 1 | 0 | 1 |
| Streptococcus agalactiae | 1 | 0 | 1 |
| Nonhemolytic streptococci | 1 | 0 | 1 |
| Staphylococcus aureus | 1 | 0 | 1 |
| Escherichia coli | 3 | 0 | 3 |
| Klebsiella pneumoniae | 2 | 0 | 2 |
| Acinetobacter spp. | 1 | 0 | 1 |
| Enterococcus avium | 1 | 0 | 1 |
| Listeria spp. | 4 | 0 | 4 |
| Salmonella spp. | 1 | 0 | 1 |
| Total | 94 | 55 | 39 |