Journal of The Academy of Clinical Microbiologists

ORIGINAL ARTICLE
Year
: 2018  |  Volume : 20  |  Issue : 2  |  Page : 84--87

Cepheid GeneXpert Mycobacterium tuberculosis/Rifampicin assay for the rapid detection of Mycobacterium tuberculosis and identification of Rifampicin resistance


MK Anand1, KB Jnaneshwara2, Asha B Patil2, M Y Balakrishna Naidu1 
1 Department of Microbiology, Culture and DST Laboratory, Karnataka Institute of Medical Sciences, Hubli, Karnataka, India
2 Department of Microbiology, Karnataka Institute of Medical Sciences, Hubli, Karnataka, India

Correspondence Address:
Dr. K B Jnaneshwara
Department of Microbiology, Karnataka Institute of Medical Sciences, Dharwad, Hubli - 580 021, Karnataka
India

CONTEXT: Rapid diagnosis and detection of Rifampicin (RIF) resistance are essential for effective disease management of tuberculosis (TB). Cartridge-based nucleic acid amplification test also known as GeneXpert Mycobacterium tuberculosis (MTB)/RIF assay is a novel integrated diagnostic system for the diagnosis of TB and rapid detection of RIF resistance in clinical specimens. AIM: In the present study, we determine the performance of the MTB/RIF assay for the rapid diagnosis of TB and detection of RIF resistance in pulmonary specimens obtained from presumptive multidrug-resistant (MDR) TB cases. SUBJECTS AND METHODS: This is a cross-sectional observational study conducted in culture and drug-susceptibility testing laboratory between January 2014 and December 2014. A total of 1994 sputum samples were obtained from presumptive MDR-TB cases of Dharwad and Belgaum districts of Karnataka. All samples were tested on GeneXpert for MTB/RIF detection. RESULTS: A total of 1994 presumptive pulmonary TB clinical samples were received of which 840 (42.1%) were MTB complex (MTBC) positive and 1154 (57.9%) were negative. The MTB/RIF assay also detected 127 (6.4%) RIF-resistant specimen and 713 (35.6%) RIF-susceptible specimens. CONCLUSIONS: The MTB/RIF test is a simple and rapid method, and staff with adequate training can perform this test with minimal laboratory setup. It helps to avoid the injudicious use of the anti-TB drug and offers high potential for the diagnosis of TB and RIF resistance due to its capacity for direct detection of MTBC, its rapidity and its simplicity.


How to cite this article:
Anand M K, Jnaneshwara K B, Patil AB, Naidu M Y. Cepheid GeneXpert Mycobacterium tuberculosis/Rifampicin assay for the rapid detection of Mycobacterium tuberculosis and identification of Rifampicin resistance.J Acad Clin Microbiol 2018;20:84-87


How to cite this URL:
Anand M K, Jnaneshwara K B, Patil AB, Naidu M Y. Cepheid GeneXpert Mycobacterium tuberculosis/Rifampicin assay for the rapid detection of Mycobacterium tuberculosis and identification of Rifampicin resistance. J Acad Clin Microbiol [serial online] 2018 [cited 2019 Apr 19 ];20:84-87
Available from: http://www.jacmjournal.org/article.asp?issn=0972-1282;year=2018;volume=20;issue=2;spage=84;epage=87;aulast=Anand;type=0