Abstract
We propose a rapid two-step PCR to amplify a 767-bp sequence present in the gene coding for the 65-kD antigen of mycobacteria. The high G+C content (80%) permitted annealing to occur at 70 degrees C, enhancing the specificity. The amplified fragment contains a restriction site for differentiation between M. tuberculosis, M. bovis/BCG, and M. avium. Complete diagnosis can be achieved in less than four hours without labelled probe or nucleic acid transfer.
MeSH terms
-
Antigens, Bacterial / genetics*
-
Base Sequence
-
DNA, Bacterial / genetics*
-
DNA, Single-Stranded
-
Enzyme-Linked Immunosorbent Assay
-
Molecular Sequence Data
-
Mycobacterium / genetics
-
Mycobacterium / immunology
-
Mycobacterium / isolation & purification*
-
Mycobacterium avium / isolation & purification
-
Mycobacterium bovis / isolation & purification
-
Mycobacterium tuberculosis / isolation & purification
-
Polymerase Chain Reaction / methods*
-
Sensitivity and Specificity
Substances
-
Antigens, Bacterial
-
DNA, Bacterial
-
DNA, Single-Stranded