COMPARISON OF FASTSURE TB DNA AND MGIT 960 FOR THE DETECTION OF MYCOBACTERIUM TUBERCULOSIS COMPLEX IN CLINICAL SPECIMENS

Detection of Mycobacterium Tuberculosis Complex

Abstract

Objective: To compare the efficacy of Fastsure TB DNA with fully automated MGIT 960 method for detection of Mycobacterium tuberculosis complex (MTB) in clinical specimens.
Study Design: Comparative cross sectional study.
Methodology: After decontamination procedure, the clinical specimens were subjected to DNA extraction and amplification. Extracted DNA was separated in a separate tube provided with fastsure TB DNA kit and was then inserted into the cartridge provided and results were observed within 30 minutes. For Processing in MGIT 960, OADC and PANTA were added to the clinical specimens after decontamination and then the tubes were processed in MGIT 960.
Results: A total of 80 specimens were tested by both MGIT 960 and fastsure TB DNA. On MGIT 960 system, 57 specimens showed growth of MTB while 23 were negative. On Fastsure TB DNA, 47 Specimens were tested as positive and 33 specimens showed negative result. Sensitivity and specificity of Fastsure TB DNA method was calculated to be 82.45 % and 100 % respectively, while positive and negative predictive values were 100 % and 69.69 % respectively.
Conclusion: Fast sure TB DNA is a rapid and accurate method for the detection of Mycobacterium tuberculosis complex (MTB) from clinical specimens.