Evaluation of the GeneXpert MTB/RIF to diagnose tuberculosis in a public health laboratory.
Rev Saude Publica 2024;
58:03. [PMID:
38381893 PMCID:
PMC10878686 DOI:
10.11606/s1518-8787.2024058005306]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 03/31/2023] [Indexed: 02/23/2024] Open
Abstract
OBJECTIVES
To evaluate the performance of geneXpert MTB/Rif versus conventional methods (bacilloscopy and culture) in the diagnosis of tuberculosis in a Central Public Health Laboratory (LACEN, Tocantins), Northern Brazil.
METHODS
Retrospective study, with information from 1,973 suspected cases of tuberculosis from patients treated from January 2015 to December 2020.
RESULTS
From the culture (reference standard), the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of the geneXpert MTB/Rif were 100%, 97%, 74%, 100%, and 97%, respectively, against 85%, 98%, 80%, 98%, and 97% of bacilloscopy.
CONCLUSIONS
The geneXpert MTB/Rif performed similarly to culture and better than bacilloscopy. Although positive cases with negative culture should be evaluated with caution, its routine use is important for the early detection of tuberculosis.
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