CSF findings according to prior antibiotic administration
| Patient category | n | Gram stain positive | Ag positive/Ag tested | WBC >100/mm3 | Protein > 0.4 g/l | Glucose < 2.0 mM/l |
|---|---|---|---|---|---|---|
| No prior antibiotics | 45 | 43 (96%) | 29/33 (88%) | 39 (80%) | 33/44 (75%) | 21/32 (66%) |
| Prior oral antibiotics only | 12 | 12 (100%) | 9/9 (100%) | 10 (83%) | 9/11 (82%) | 5/12 (42%) |
| Prior parenteral antibiotics | 33 | 24 (73%) | 14/18 (74%) | 27 (82%) | 24/27 (89%) | 16/31 (52%) |
| Total | 90 | 79 (88%) | 52/60 (87%) | 76 (84%) | 66/82 (80%) | 42/75 (56%) |