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Updated: Jul 16, 2026

Imaging of In Situ Interferon Gamma Production in the Mouse Spleen following Listeria monocytogenes Infection
Published on: July 16, 2019
[False-positive interferon-gamma test?]
M Priwitzer1, C Unger, F Spieth
1Landeshauptstadt Stuttgart, Gesundheitsamt, Stuttgart. martin.priwitzer@stuttgart.de
Abstract:
M. tuberculosis specific interferon-gamma tests have been established lately as an important additional instrument in the diagnosis of the latent tuberculosis infection (LTBI). In several studies these tests had a higher specificity compared to the tuberculin skin test (TST). In this report we describe the case of a woman without increased risk for LTBI and with discordant results for the interferon-gamma tests QuantiFERON-TB Gold In-Tube and T-SPOT.TB and for the TST. The findings suggest repeated false-positive results of the QuantiFERON-TB Gold In-Tube test.
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