Rural residence (aOR 4.1, 95% CI 1.214.4) and raised CSF ADA (10 IU/L) (aOR 25.5, 95% CI 3.1212) were associated with bacterial meningitis when compared with viral meningitis; similarly, raised CSF ADA (10 IU/L) (aOR 42.2, 95% CI 2.0882) was associated with tubercular meningitis. Here, ADA is linked to meningeal tuberculosis.