https://phys.org/news/2018-11-movement-evolutionary-history-tuberculosis-china.html > "Yes, I was surprised at the lack of diversity in the bacterium," said Caitlin Pepperell, an associate professor of medical microbiology at University of Wisconsin-Madison. Pepperell is a corresponding author in a paper published online today (Nov. 5) in Nature Ecology and Evolution that looked at 4,578 samples from patients in China. > Pepperell's co-authors included Qian Gao and Qingyun Liu, both at the Shanghai Public Health Clinical Center and Fudan University in Shanghai.