**3.7 Diagnostic categories according to Thwaites et al. 2005**

**Confirmed TBM**: Clinical meningitis, abnormal CSF parameters and acid-fast bacilli in CSF (microscopy) and/or positive culture for Mycobacterium tuberculosis.

**Probable TBM:** Clinical meningitis, abnormal CSF parameters and at least one of the following:


**Possible TBM**: Clinical meningitis abnormal CSF parameters and at least 4 of the following:

