The drug-resistant stomach bug, a major cause of inflammatory diarrhea, is a “serious public health threat.”

The Centers for Disease Control and Prevention is warning about a rise in extensively drug-resistant cases of the bacterial infection Shigella, a major cause of inflammatory diarrhea.

The agency calls the new form of the stomach bug, which causes the diarrheal condition known as shigellosis, a “serious public health threat.” Evidence suggests the illness is spreading among gay and bisexual men in particular, apparently through sexual contact, both in the U.S. and abroad…

Read the article on NBC News.