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Table 1 The mean ADA activity (with range) in the CSF of TBM patients (n = 117), non-TBM infectious meningitis patients (n = 60) and control patients with non-infectious neurological disorders (n = 104). The data are expressed as mean ± SD

From: Cerebrospinal fluid adenosine deaminase activity: A complimentary tool in the early diagnosis of tuberculous meningitis

Patient groups

ADA activity (U/L/min) Mean ± SD

Range

1. Tuberculous Meningitis (n = 117)

14.31 ± 3.87

2.99–26.94

   Culture positive (n = 27)

17.67 ± 4.18

9.01–26.94

   Clinically suspected (n = 90)

13.29 ± 3.16

2.99–21.02

2. Non TBM infectious meningitis (n = 60)

9.25 ± 2.14

4.99–13.96

   Pyogenic meningitis (n = 41)

10.11 ± 1.99

5.11–13.96

   Viral meningitis (n = 19)

7.39 ± 0.93

4.99–9.00

3. Non-infectious neurological disorders (n = 104)

2.71 ± 1.96

0.00–7.68

   Headache (n = 32)

0.98 ± 0.19

0.11–1.20

   Stroke (n = 29)

4.18 ± 1.19

1.92–5.83

   Venous sinus thrombosis (n = 13)

1.82–4.12

 

   Guillian-Barré syndrome (n = 12)

5.38 ± 2.16

2.63–7.68

   Epilepsy (n = 6)

2.36 ± 0.79

1.01–3.18

   Other neurological disorders (n = 12)

1.18 ± 0.47

0.5–1.87