Enhancement of diagnostic efficiency by a gamma interferon release assay for pulmonary tuberculosis.

Clin Vaccine Immunol

Laboratory of Seroepidemiology and Immunobiology, Instituto de Medicina Tropical de São Paulo, University of São Paulo, São Paulo, Brazil.

Published: June 2008

This study was designed to examine the use of the QuantiFERON-TB Gold assay as an aid in the diagnosis of active pulmonary tuberculosis (TB) in Brazilian patients. Using the receiver operating characteristic curve, the cutoff was adjusted to >or=0.20 IU/ml. The sensitivity increased to 86%, with 100% specificity. All TB patients with negative sputum smear microscopy and negative culture results were positive using this test.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2446630PMC
http://dx.doi.org/10.1128/CVI.00026-08DOI Listing

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