1. Andersen P & Doherty TM (2005) The success and failure of BCG-implications for a novel tuberculosis vaccine. Nat Rev Microbiol 3: 656â662.
2. Bardarov S , Bardarov S Jr , Pavelka MS Jr , Sambandamurthy V , Larsen M , Tufariello J , Chan J , Hatfull G & Jacobs WR Jr (2002) Specialized transduction: an efficient method for generating marked and unmarked targeted gene disruptions in Mycobacterium tuberculosis, M. bovis BCG and M. smegmatis. Microbiology 148: 3007â3017.
3. Charles C & Shepard MD (1960) The experimental disease that follows the injection of human leprosy bacilli into foot-pads of mice. J Exp Med 112: 445â454.
4. Clements DL , Lee BY & Horwitz MA (1995) Purification, characterization, and genetic-analysis of Mycobacterium tuberculosis urease, a potentially critical determinant of host-pathogen interaction. J Bacteriol 177: 5644â5652.
5. Dockrell HM , Young SK , Britton K et al. (1996) Induction of Th1 cytokine responses by mycobacterial antigens in leprosy. Infect Immun 64: 4385â4389.