| abstract |
A mutated mycobacterium selected from the class consisting of mutated M.bovis-BCG, mutated M.tuberculosis, and mutated M.leprae. The mutation of M.bovis-BCG, M.tuberculosis, or M.leprae is preferably effected through an insertional mutation of a mycobacterial gene. The insertional mutagenesis may be effected, for example, through illegitimate recombination or by a mycobacterial transposon. Such mutated mycobacteria may then be transformed with an expression vector (s) containing a complement gene to the gene which is mutated, and preferably also including a heterologous gene. |