Here's what to know about the treatment-resistant strain of Shigella that the CDC is warning the public about.

Add Yahoo as a preferred source to see more of our stories on Google. Shigella bacteria (Photo by Smith Collection/Gado/Getty Images) Cases of a drug-resistant infection that causes severe diarrhea ...

Jay Bhattacharya is director of the National Institutes of Health and senior official carrying out the delegable duties of ...