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Updated: May 29, 2025

Diagnosing Pulmonary Tuberculosis with the Xpert MTB/RIF Test
Published on: April 9, 2012
Impact of repeat testing in tuberculosis patients with a trace call on Xpert MTB/RIF Ultra: a retrospective cohort
Suyash Jha1, Nitin Gupta2, Tirlangi Praveen Kumar2
1Department of Respiratory Medicine, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Udupi, Karnataka, India 576104.
Background:
This study aimed to see if rifampicin susceptibility can be determined on repeat sampling in pulmonary tuberculosis with a trace call on the first GeneXpert Ultra report.
Methods:
This retrospective cohort study included adults with a GeneXpert Ultra trace call in the first respiratory sample from January 2021 to June 2024.
Results:
Of the 27 patients with repeat sampling done after the initial trace call, rifampicin susceptibility could be determined in 37% (n=10) of patients.
Conclusions:
Repeating GeneXpert Ultra testing in patients with an initial trace call is valuable for determining rifampicin susceptibility.
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