2 strains of bacteria cause nearly all TB cases in China

Just two strains of Mycobacterium tuberculosis account for almost all cases of tuberculosis in China, according to study findings published in Nature Ecology & Evolution.

“Mycobacterium tuberculosis complex (MTBC), which causes tuberculosis (TB), has circulated among human populations for thousands of years,” Caitlin S. Pepperell, MD, associate professor of medical microbiology at University of Wisconsin-Madison, and colleagues wrote.