False Rifampicin Resistance in Xpert Ultra Applied to Lymph Node Aspirate: A Case Report.
Kamela Charmaine NgLeen RigoutsBouke C de JongLutgarde LynenPublished in: Open forum infectious diseases (2020)
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.