GeneXpert MTB/RIF Assay with Transbronchial Lung Cryobiopsy for Mycobacterium Tuberculosis Diagnosis

Overview

Journal Ann Transl Med

Publisher AME Publishing Company

Date 2020 May 2

PMID 32355795

Citations 7

Authors

Olivia Sanchez-Cabral

Cira Santillan-Diaz

Angel Paul Flores-Bello

Mildred Ivannia Herrera-Ortega

Jose Luis Sandoval-Gutierrez

Patricio Santillan-Doherty

Dina Martinez-Mendoza

Affiliations

Soon will be listed here.

Abstract

Background: Early tuberculosis (TB) diagnostic is one of the critical steps to TB control. GeneXpert MTB/RIF has been widely proven for a prompt TB diagnosis. The use of GeneXpert MTB/RIF assay with transbronchial lung cryobiopsy samples may increase diagnostic accuracy. We aim to assess the diagnostic of TB with GeneXpert MTB/RIF assay with transbronchial lung cryobiopsy.

Methods: Patients with suspected diagnosis of TB and negative smear microscopies, with TB culture and GeneXpert MTB/RIF assay with transbronchial lung cryobiopsy were included in this cross-sectional study. Participants were enrolled from 2016 to 2018 at National Institute of Respiratory Diseases, Mexico.

Results: We included 54 patients (77.8% males) aged 30 to 65 years. The sensitivity of the GeneXpert MTB/RIF assay with transbronchial lung cryobiopsy was 81.3% (95% CI, 62.1-100%), with a specificity of 100% (95% CI, 100-100%) and a negative predictive value of 92.7% (95% CI, 84.7-100%). Twenty-two patients of the total population have HIV, the sensitivity of the test in these patients was 87.5% (95% CI, 64.6-100%). Also, 28 patients with a peripheral localized lesion which had a solid pattern were identified (51.9%). The sensitivity in patients with peripheral localized lesions was 88.9% (68.4-100%).

Conclusions: The GeneXpert MTB/RIF assay with transbronchial lung cryobiopsy test is as efficient as broncho alveolar lavage for TB diagnosis. Transbronchial lung cryobiopsy increases a major diagnostic opportunity when the nature of illness is malignant. Transbronchial lung cryobiopsy is efficient in HIV patients, especially in patients with peripheral localized lesion.

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