2018-12-11 12:00 - Maintenance complete.

Clinical value of a uniform research case definition of tuberculous meningitis

Wessels, Marie (2014-04)

Thesis (MMed)--Stellenbosch University, 2014.


ENGLISH ABSTRACT: BACKGROUND: Tuberculous meningitis (TBM) research remains important but obtaining adequate sample sizes of microbiologically-confirmed TBM cases is difficult, therefore clinical cases of TBM need to be included. A uniform research case definition for TBM was developed to assist diagnostic standardization. METHODS: Our study evaluated the proposed uniform research case definition in a group of children diagnosed with TBM. A subgroup of 66 children with cultureconfirmed TBM was compared to culture-confirmed bacterial meningitis controls. RESULTS: The uniform case definition was applied to 554 TBM patients. Sixty-six (11.9%) patients had definite TBM, 408 (73.6%) had probable TBM and 72 (13.0%) had possible TBM. Symptom duration >5 days, weight loss or persistent cough >2 weeks, recent TB contact, focal neurological deficit, clear cerebrospinal fluid (CSF) appearance and basal meningeal enhancement predicted TBM when compared to definite bacterial meningitis with a sensitivity and specificity of 97.0% and 93.7%, respectively. When using a probable TBM score as the diagnostic measure, sensitivity was 86% and specificity was 100%. When using a possible TBM score as the diagnostic measure, sensitivity was 100% but specificity was 56%. CONCLUSION: The uniform research case definition for TBM performed well when using a probable TBM score as the diagnostic marker. A regression model also differentiated TBM from bacterial meningitis with good accuracy, but caution is needed in its application to early TBM.

Please refer to this item in SUNScholar by using the following persistent URL: http://hdl.handle.net/10019.1/86775
This item appears in the following collections: