The present study was further extended to assess the best
predictor of activity against pathogenic M. tuberculosis amongst
the non-pathogenic mycobacterial strains used in the current
study. The correlation coefficients (r) values obtained are presented
in Table 3. M. tuberculosis; strain H37Ra was the best predictor
of activity against the pathogenic M. tuberculosis (correlation
coefficient¼0.7723) (Table 3).