1. Predictors of cerebrospinal fluid GeneXpert MTB/RIF positivity in patients with tuberculous meningitis: A prospective cohort study
- Author
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Priyanka Gupta, Neeraj Kumar, Ravindra Kumar Garg, Hardeep Singh Malhotra, Imran Rizvi, Rajesh Verma, Praveen Kumar Sharma, Ravi Uniyal, Shweta Pandey, Amita Jain, and Parul Jain
- Subjects
tuberculous meningitis ,mycobacterium tuberculosis ,cerebrospinal fluid ,ziehl-neelsen staining ,genexpert ,Arctic medicine. Tropical medicine ,RC955-962 - Abstract
Objective: To identify the clinical, laboratory, and radiological markers that could predict a positive GeneXpert result in patients suspected of tuberculous meningitis. Methods: In this prospective, observational study, patients with tuberculous meningitis were systematically evaluated. Various clinical, laboratory [including cerebrospinal fluid (CSF) microscopy, culture, and GeneXpert], and neuroimaging factors were examined. All participants were administered anti-tuberculous treatment and corticosteroids. A six-month follow-up was done to evaluate the outcome. Results: Of the 116 patients studied, 54 (46.6%) tested positive for GeneXpert, while 62 (53.4%) were negative. Third cranial nerve involvement (OR 3.71, 95% CI 1.052-13.09, P=0.04) and the presence of basal exudates on neuroimaging (OR 5.22, 95% CI 2.03-13.42, P=0.001) emerged as independent predictive factors for a positive GeneXpert result. A positive CSF GeneXpert result (P=0.002) and drug resistance (P=0.004) were significantly linked to adverse outcomes. Additionally, a high score on the Medical Research Council stage III (OR 5.64, 95% CI 1.18-26.87, P=0.03) and elevated CSF cell counts (OR 1.002, 95% CI 1.00-1.001, P=0.03) were identified as independent predictors of poor prognosis. Conclusions: Third cranial nerve involvement and the presence of basal exudates were significant indicators of a positive GeneXpert result. MRC stage III disability and elevated CSF cell counts predicted poor outcomes.
- Published
- 2024
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