Validation of the Uniform Case Definition Criteria for Differentiating Tuberculous Meningitis, Viral Meningitis, and Bacterial Meningitis in Adults.

We validated the uniform case definition for differentiating tuberculous meningitis (TBM) from both viral meningitis (VM) and bacterial meningitis (BM) in adults from South Korea, a country with an intermediate TB-burden. 'Probable' TBM differentiated 'definite' TBM with a sensitivity of 81% and specificity of 98%. 'Possible TBM' criteria identified 'definite' TBM with a sensitivity of 100% and specificity of 60%. Despite the usefulness of the uniform case definition criteria, there was substantial overlaps among VM, BM, and 'possible' TBM, especially in severe cases of VM and indolent cases of BM.