Table 1. Demographic, clinical, and laboratory data of cerebrospinal fluid samples from 51 patients examined by PCR to diagnose bacterial meningitis after neurosurgery.

Patients treated by neurosurgery (n=43)
Male	n=23 (53%)
Age (years)	Mean: 52.5 (range:18-87)
Neurological conditions
CNS tumors	n=12 (28%)
Hydrocephalus	n=6 (14%)
Subarachnoid hemorrhage	n=6 (14%)
Head trauma	n=5 (11%)
Cerebellar/brain hematomas	n=4 (9%)
Stroke	n=2 (5%)
Neurocysticercosis	n=2 (5%)
Cist	n=2 (5%)
Vertebral instability	n=2 (5%)
Meningioma	n=1 (2%)
Lesion in fourth ventricle	n=1 (2%)
CSF cell count	Mean: 475 cells/mm3 (range: 0-4904)
CSF protein level	Mean: 163 mg/dL (range: 10-735)
CSF lactate concentration	Mean: 44 mg/dL (range: 11-162)
Glucose level	Mean: 60 mg/dL (range: 3-206)

Patients treated by neurosurgery (n=43)
Male	n=2 (25%)
Age (years)	Mean: 43 (range:39-47)

CNS: central nervous system; CSF: cerebrospinal fluid.