[The activities of 3 enzymes in serum and cerebrospinal fluid for diagnosis of tuberculous meningitis].

The adenosine deaminase (ADA), lysozyme (LZM) and lactate dehydrogenase (LDH) of serum and cerebrospinal fluid (CSF) were determined in 36 patients with tuberculous meningitis (TBM), 47 patients with non-tuberculous meningitis (N-T-BM) and 20 patients with non-central nervous system diseases(control group). The results showed that the assessment of serum and CSF ADA and LZM activity may be helpful to the differential diagnosis between TBM and N-TBM.