Tuberculostearic acid, a potential parameter for scoring system construction for tuberculous meningitis diagnosis

Area of Science:

• Neuroscience
• Infectious Diseases
• Biochemistry

Background:

• Tuberculous meningitis (TBM) is a severe form of tuberculosis affecting the central nervous system.
• Accurate and timely diagnosis of TBM is crucial for effective treatment and improved patient outcomes.
• Current diagnostic methods for TBM can be slow and lack sensitivity.

Purpose of the Study:

• To validate tuberculostearic acid (TBSA) as a biomarker for Mycobacterium tuberculosis (Mtb) detection.
• To assess the utility of TBSA in assisting the clinical diagnosis of TBM.
• To evaluate the correlation between TBSA levels and TBM diagnosis using established scoring systems.

Main Methods:

• Cerebrospinal fluid (CSF) samples were collected from patients via lumbar puncture.
• TBSA levels were quantified using gas chromatography/mass spectrometry.
• Gold standard Mtb detection tests and the Lancet consensus scoring system were employed for comparison.

Main Results:

• The study included 140 patients, with 27 confirmed TBM cases and 50 TBSA-positive patients.
• TBSA demonstrated a sensitivity of 0.7407 (95% CI: 0.5372-0.8889) and specificity of 0.7345 (95% CI: 0.6432-0.8132).
• TBSA-positive patients exhibited a similar distribution within the Lancet TBM scoring system as definite TBM cases.

Conclusions:

• Tuberculostearic acid (TBSA) shows promise as a biomarker for Mycobacterium tuberculosis (Mtb).
• Integrating TBSA into diagnostic scoring systems could enhance the accuracy of tuberculous meningitis (TBM) diagnosis.
• Further research is warranted to explore the full potential of TBSA in TBM diagnostics.