Serological diagnosis for active tuberculosis in Malaysian population: Comparison of four protein candidate
Journal Title: Asian Pacific Journal of Tropical Disease - Year 2012, Vol 2, Issue 0
Abstract
Objective: To asses the ability of 4 types of Mtb proteins-ESAT6, SCWP, MAN and Ag85 to serve as indicator for active tuberculosis among Malaysian population. Methods: Sera from 90 individuals, 60 from confirmed pulmonary tuberculosis patients and 30 healthy PPD negative individuals were tested for presence of anti-IgG and anti IgA by ELISA assay. Result: Mean concentration of IgG and IgA were higher in patients compared to healthy Positivity of the ELISA test were calculated, taking the cut off value at mean +2 SD of healthy sera. The sensitivity of the ELISA IgA assay for ESAT 6, SCWP, MAN and Ag85 were 81.1%, 83.3%, 11.7% and 53.3% respectively. The sensitivity of the ELISA IgG asay for ESAT 6, SCWP, MAN and Ag85 were 71.0%, 71.0%, 71.0% and 21.0% respectively. Conclusion: Detectionof IgA against SCWP promised a good indicator for active tuberculosis infection among Malaysian.
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