Inventors:
Marcel Behr - Montreal, CA
Peter Small - Seattle WA, US
Gary Schoolnik - Stanford CA, US
Michael A. Wilson - Bethesda MD, US
Assignee:
The Board of Trustees of the Leland Stanford Junior University - Palo Alto CA
International Classification:
A61K 48/00, A61K 39/02, A61K 39/04, C12N 1/21, C12N 15/63, C07H 21/04
US Classification:
4241851, 424 931, 424 932, 424 934, 4241841, 4241901, 4241921, 4241931, 42419711, 4242341, 4242481, 4353201, 4352523, 4352531, 514 2
Abstract:
Specific genetic deletion are identified in mycobacteria isolates, including variations in the genome sequence between isolates, and numerous deletion present in BCG as compared to M. tb. These deletions are used as markers to distinguish between pathogenic and avirulent strains, and as a marker for particular M. tb isolates. Deletions specific to vaccine strains of BCG are useful in determining whether a positive tuberculin skin test is indicative of actual tuberculosis infection. The deleted sequences may be re-introduced into BCG to improve the efficacy of vaccination. Alternatively, the genetic sequence that corresponds to the deletion(s) are deleted from or to attenuate the pathogenic bacteria.