Rodents
Potentially, anyway. One of the challenges facing infectious disease medicine in the developing world is the cost of diagnosis: diagnostic tests are often invented in wealthy countries with access to expensive equipment and supplies (and, in those countries, these don't seem very expensive at all). Tuberculosis (TB) is difficult to diagnose in wealthy countries, and the inability to afford expensive diagnostics in the developing world--where most TB cases occur--only further compounds the problem.
So this report of a potentially cheap and more effective way to figure out if someone has…