Diagnostic Accuracy of The TrueNat MTB/RIF Assay And Comparison With The Reference Standards To Detect Pulmonary Tuberculosis And Rifampicin Resistance in Sputum Samples From Patients Attending A Tertiary Care Hospital in Bhubaneswar, India
DOI:
https://doi.org/10.55489/njcm.150320243413Keywords:
Diagnostic accuracy, TrueNAT MTB/RIF Assay, pulmonary tuberculosis, RIF resistance, patientsAbstract
Background: A rapid and accurate diagnostic tool is necessary for correct diagnosis and treatment of TB. This study evaluated and compared the sensitivity, specificity and concordance of TrueNAT MTB/RIF assay with smear microscopy, Xpert MTB/RIF and MGIT culture.
Methods: In all, 4500 patients (1500 each of patients with Diabetes, elderly and HIV-positive patients) attending the Chest and TB department of Capital Hospital, Bhubaneswar were screened. 392 sputum samples were collected from presumptive TB patients. Standard diagnostic procedures (Smear Microscopy, Xpert MTB/RIF, TrueNAT MTB tests and MGIT culture) were performed.
Results: This diagnostic efficiency of rapid molecular TrueNAT MTB/RIF assays have similar properties as Xpert MTB/RIF and may be used for the diagnosis of TB and Rifampicin resistance. Among participants, the TrueNAT MTB shows the sensitivity of 80%, 100% and 78.26% while the specificity was 97.9%, 95.83% and 100%. The concordance rates between all tests were calculated and the TrueNAT MTB showed good agreement with the culture method among study participants (κ = 0.793, 0.554, and 0.862, respectively).
Conclusion: The TrueNAT assays are sensitive for diagnosis of TB patients with faster turnabout time from testing to treatment and economical.
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Copyright (c) 2024 Braja Barik, Shritam Das, Khusbu Singh, Sudatta Chandan, Subrat Kumar Swain, Prasanti Nayak, Omkar Abadesh Mishra, Tahziba Hussain, Dasarathi Das, Sanghamitra Pati
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