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Updated: Aug 23, 2026

Diagnosing Pulmonary Tuberculosis with the Xpert MTB/RIF Test
Published on: April 9, 2012
Reactivation of tuberculosis during immunosuppressive treatment in a patient with a positive QuantiFERON-RD1 test
Pernille Ravn1, Martin E Munk, Ase Bengaard Andersen
1Department of Infectious Diseases, Hvidovre Hospital, Copenhagen, Denmark. pravn@dadlnet.dk
Abstract:
A patient with polymyositis developed tuberculosis during immunosuppressive treatment. Tuberculin Skin Test and chest X-ray failed to demonstrate latent tuberculosis, whereas a blood sample that was tested with a modified QuantiFERON-TB-assay, using the recombinant ESAT-6 and CFP-10, was positive indicating that this patient was latently infected before immunosuppressive therapy. This case indicates the risk of progressing from latent to active tuberculosis given that the subject is RD1 responsive, and we believe that preventive anti-tuberculous treatment could have prevented this case of tuberculosis. We suggest that RD1 based tests are evaluated further in immunocompromised patients.
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