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Published in: Fluids and Barriers of the CNS 1/2007

Open Access 01-12-2007 | Research

Evaluation of the IS6110 PCR assay for the rapid diagnosis of tuberculous meningitis

Authors: Poonam S Deshpande, Rajpal S Kashyap, Sonali S Ramteke, Khushboo J Nagdev, Hemant J Purohit, Girdhar M Taori, Hatim F Daginawala

Published in: Fluids and Barriers of the CNS | Issue 1/2007

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Abstract

Background

Tuberculous meningitis (TBM) is one of the common clinical manifestations of extra-pulmonary tuberculosis. It is difficult to diagnose due to a lack of rapid, sensitive, and specific tests. Newer methods, which are easy and reliable, are required to diagnose TBM at an early stage. Thus our aim was to evaluate the polymerase chain reaction (PCR) technique, using primers directed against the IS6110 gene, for the detection of Mycobacterium tuberculosis in the CSF, for the diagnosis of TBM patients.

Methods

An in-house IS6110 PCR method using a specific pair of primers designed to amplify the insertion sequence, IS6110, in the M. tuberculosis genome was used to analyze CSF. A total of 80 CSF samples from different groups of patients were studied (confirmed TBM n = 35, clinically suspected TBM n = 16, non-TBM infectious meningitis n = 12, non infectious neurological diseases n = 17).

Results

PCR gave a sensitivity of 91.4% and specificity of 75.9% for the diagnosis of TBM in patients with TBM confirmed by culture. In 16 clinically diagnosed, but unconfirmed, TBM cases PCR was positive in 10 (62.5%) cases. There were seven (24.1%) PCR-positive cases among the 29 patients with non-TBM and non-infectious neurological disease.

Conclusion

We conclude that the performance of an in-house IS6110 PCR assay is valuable in the rapid diagnosis of tuberculous meningitis.
Appendix
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Metadata
Title
Evaluation of the IS6110 PCR assay for the rapid diagnosis of tuberculous meningitis
Authors
Poonam S Deshpande
Rajpal S Kashyap
Sonali S Ramteke
Khushboo J Nagdev
Hemant J Purohit
Girdhar M Taori
Hatim F Daginawala
Publication date
01-12-2007
Publisher
BioMed Central
Published in
Fluids and Barriers of the CNS / Issue 1/2007
Electronic ISSN: 2045-8118
DOI
https://doi.org/10.1186/1743-8454-4-10

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