Improving T-cell assays for the diagnosis of latent TB infection: potential of a diagnostic test based on IP-10.

PLoS One · 2008 · PMC2483344 · PMID 18682747

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There was a significant trend for increasing test positivity rate by increasing smear grade among the TB contacts for all biomarkers (p<0.0001, Cochran-Armitage test for trend).

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