AI Article Synopsis
- The study explores a new coloured agar-based culture test for diagnosing multidrug-resistant tuberculosis in rural settings, which could be simpler and faster than current methods.
- The test was evaluated with 101 participants in Malawi, showing high agreement with the traditional AFB smear test and a confirmation rate from a molecular test.
- The results suggest that this CX-test could serve as a reliable and low-cost option for detecting active pulmonary tuberculosis in areas with limited medical resources.
Article Abstract
Background: Rural settings where molecular tuberculosis diagnostics are not currently available need easy-to-use tests that do not require additional processing or equipment. While acid-fast bacilli (AFB) smear is the most common and often only tuberculosis diagnosis test performed in rural settings, it is labour intensive, has less-than-ideal sensitivity, and cannot assess tuberculosis drug susceptibility patterns.
Objective: The objective of this study was to determine the feasibility of a multidrug-resistant (MDR) or extensively drug-resistant (XDR)-tuberculosis coloured agar-based culture test (tuberculosis CX-test), which can detect growth and evaluate for drug susceptibility to isoniazid, rifampicin and a fluoroquinolone (i.e. ciprofloxacin) in approximately 14 days.
Method: In this study, 101 participants were enrolled who presented to a rural health clinic in central Malawi. They were suspected of having active pulmonary tuberculosis. Participants provided demographic and clinical data and submitted sputum samples for tuberculosis testing using the AFB smear and tuberculosis CX-test.
Results: The results showed a high level of concordance between the AFB smear (12 positive) and tuberculosis CX-test (13 positive); only one sample presented discordant results, with the molecular GeneXpert MTB/RIF test confirming the tuberculosis CX-test results. The average time to a positive tuberculosis CX-test was 10 days. Of the positive samples, the tuberculosis CX-test detected no cases of drug resistance, which was later confirmed by the GeneXpert MTB/RIF.
Conclusion: These findings demonstrate that the tuberculosis CX-test could be a reliable low-cost diagnostic method for active pulmonary tuberculosis in high tuberculosis burden rural areas.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6018377 | PMC |
| http://dx.doi.org/10.4102/ajlm.v7i1.690 | DOI Listing |
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Article Synopsis
- The study explores a new coloured agar-based culture test for diagnosing multidrug-resistant tuberculosis in rural settings, which could be simpler and faster than current methods.
- The test was evaluated with 101 participants in Malawi, showing high agreement with the traditional AFB smear test and a confirmation rate from a molecular test.
- The results suggest that this CX-test could serve as a reliable and low-cost option for detecting active pulmonary tuberculosis in areas with limited medical resources.
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