Table 5. Laboratory confirmed aetiology for adult patients meeting the case definition of bacterial meningitis enrolled in the study (excluding dual infections).
| Pathogen, n (%) | Adults (n = 302) | ||
| PCR results | Culture results | Combined results of PCR and culture | |
| Streptococcus suis serotype 2 | 147 (49) | 99 (33) | 147 (49) |
| Streptococcus pneumoniae | 35 (12) | 15 (5) | 35 (12) |
| Haemophilus influenzae type b | 0 (0) | 0 (0) | 0 (0) |
| Neisseria meningitidis | 3 (1) | 1 (0.1) | 4 (1) |
| Streptococcus spp | – | 2 (0.6) | 2 (0.6) |
| Staphylococcus spp | – | 1 (0.3) | 1 (0.3) |
| Escherichia coli | – | 2 (0.6) | 2 (0.6) |
| Acinetobacter spp | – | 1 (0.3) | 1 (0.3) |
| Klebsiella pneumoniae | – | 5 (2) | 5 (2) |
| Enterococcus spp | – | 1 (0.3) | 1 (0.3) |
| Unknown aetiology1 | 117 (38) | 175 (58) | 104 (34) |
1
“Unknown aetiology” corresponds to the probable cases.