Baylor College of Medicine

Fouad A El-Zaatari

Saleh Naser

David Y Graham

Recombinant clone pMptb #48 expressing a 36k M. paratuberculosis antigen is provided that provides a more sensitive and discriminating test than those in which crude antigens have been used. A mycobacterial genus-specific DNA probe corresponding to a 1.4 kb BamH1-DNA insert in pMptb #48 is also provided. The 1.4 kb insert includes the entire DNA coding sequence for an M. paratuberculosis 36k protein. There is also provided methods for serologically testing specimens which include the use of recombinant clone pMptb #48 and/or the p36k protein and/or fragments of the p36k protein. Also provided are methods for identifying mycobacterial infections using a probe corresponding to the 1.4 kb DNA sequence shown in FIG. 4, the coding portion of the 1.4 kb DNA sequence, or fragments thereof.

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Pearland, TX, United States of America

Fouad A El-Zaatari