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Updated: Jun 21, 2026

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Diagnosing Pulmonary Tuberculosis with the Xpert MTB/RIF Test
Published on: April 9, 2012
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False Rifampicin Resistance in Xpert Ultra Applied to Lymph Node Aspirate: A Case Report
Kamela C S Ng1,2, Leen Rigouts1, Bouke C de Jong1
1Mycobacteriology Unit, Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium.
Open Forum Infectious Diseases
|July 2, 2020
Abstract:
A 36-year-old male patient was diagnosed with tuberculosis in Antwerp, Belgium, in May 2018. His lymph node aspirate initially tested rifampicin resistant in Xpert MTB/RIF Ultra, but tested susceptible in all other tests including targeted deep sequencing due to a rare matrix effect in the Xpert MTB/RIF Ultra reaction tube.
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