Dear Doctors: I got a tuberculosis skin test for my health care job and tested positive. A follow-up blood test was also positive, and I was diagnosed with latent TB. However, I had no known exposure.

Among hospital employees who underwent serial interferon-γ release assay testing, converters with interferon levels close to the cutoff value often tested negative months later. In high-income western ...

The tuberculin test can be helpful in the diagnosis of Mycobacterium tuberculosis infection. A recent CMAJ article mentions that false-positive test results can occur in those who have received BCG ...

Identifying and treating latent TB is a key component of global efforts to eliminate TB. A number of therapeutic regimens using courses and combinations of isoniazid (INH), rifampin or pyrazinamide ...