1 Department of Microbiology and Immunology and McGill International Tuberculosis Centre, McGill University Health Centre, Montreal, OC, Canada.
2 Department of Animal Science and the Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, PA 16802, USA.
3 Department of Clinical Microbiology, Christian Medical College, Vellore, India.
4 Department of Microbiology and Immunology and McGill International Tuberculosis Centre, McGill University Health Centre, Montreal, OC, Canada. Electronic address: marcel.behr@mcgill.ca.
5 Department of Animal Science and the Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, PA 16802, USA. Electronic address: vkapur@psu.edu.