Mycobacterium tuberculosis, the bacteria that causes tuberculosis (TB) has been present in the human population since antiquity. Today over 2 billion people have been exposed. What can we learn form this remarkably resilient bacteria, and how do we address the formidable challenge of treating drug resistant strains? Dr. Jeffrey Cirillo, associate professor of microbial and molecular pathogenesis at the Texas A&M Health Science Center College of Medicine, examines tuberculosis from molecular to organ-specific levels and outlines the emergence of multidrug resistance across the world. Hosted by Dr. Mary Leuchars.