Medically reviewed by Shadi Hamdeh, MD Diarrhea is usually contagious when it is acute, meaning it comes on suddenly. Acute diarrhea is often caused by a microorganism such as a bacteria or virus.

I think it's part of life for people to occasionally get episodes of diarrhea. For acute diarrhea, we look at acute infections. We may not do anything except to treat it symptomatically or do a ...

Acute, bacterial diarrhea can be severe and, in some cases, life-threatening. The standard method with which to diagnose acute, infectious diarrhea is bacteriological culture; however, this ...