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Chinese Journal of Antituberculosis ›› 2005, Vol. 27 ›› Issue (1): 18-22.

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Comparison of phage-amplified biologically assay and conventional proportion method for the drug susceptibility testing in Mycobacterium tuberculosis

Peng Li,Chen Baowen,Shen Xiabing,et al.   

  1. Department of Pulmonary Disease, The First Affiliated Hospital of Chongqing University of Medical Sciences,Chongqing 400016
  • Online:2005-01-10 Published:2005-11-03

Abstract: Objective To evaluate the value of phage-amplified biologically assay (PhaB),to set up a fast,sensitive,specific and inexpensive method for testing the drug susceptibility in Mycobacterium tuberculosis.Methods Fifty-two M.tuberculosis isolates were tested the susceptibility to rifampicin and isoniazid by using the PhaB assay and the conventional proportion method.Results Using the conventional proportion method as control,the sensitivity of testing using the PhaB assay were 94.1% (32/34) on rifampicin-resistant isolates,and 92.1% (35/38) on isoniazid-resistant isolates,the specificity were 94.4% (17/18) on rifampicin-sensitive isolates,and 78.6% (11/14) on isoniazid-sensitive isolates.The two susceptibility Methods for rifampicin and isoniazid were 94.2% and 88.5% agreement respectively.Conclusion The PhaB assay could test correctly the drug susceptibility on the majority of M.tuberculosis isolates in 2 to 4 days.It might become a drug susceptibility testing with simplicity,high sensitivity,high specificity and low cost.

Key words: Bacteriophage, Rifampicin, Isoniazid, Mycobacterium tuberculosis, Drug susceptibility test