Low-cost diagnostic test for susceptible and drug-resistant tuberculosis in rural Malawi
African Journal of Laboratory Medicine
| Field | Value | |
| Title | Low-cost diagnostic test for susceptible and drug-resistant tuberculosis in rural Malawi | |
| Creator | Zhang, Annie Jumbe, Enoch Krysiak, Robert Sidiki, Sabeen Kelley, Holden V. Chemey, Elly K. Kamba, Chancy Mwapasa, Victor García, Juan I. Norris, Alison Pan, Xueliang J. Evans, Carlton Wang, Shu-Hua Kwiek, Jesse J. Torrelles, Jordi B. | |
| Description | 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 Mycobacterium tuberculosis 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. | |
| Publisher | AOSIS | |
| Date | 2018-06-04 | |
| Identifier | 10.4102/ajlm.v7i1.690 | |
| Source | African Journal of Laboratory Medicine; Vol 7, No 1 (2018); 6 pages 2225-2010 2225-2002 | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://ajlmonline.org/index.php/ajlm/article/view/690/1008
https://ajlmonline.org/index.php/ajlm/article/view/690/1007
https://ajlmonline.org/index.php/ajlm/article/view/690/1009
https://ajlmonline.org/index.php/ajlm/article/view/690/1002
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