There are different isolation regimes available depending on causative agent and mode of transmission. A community-acquired acute gastroenteritis (GE) is most often caused by Norovirus while a hospital-acquired acute GE is often caused by toxin producing Clostridium difficile. Patients infected with Norovirus or Clostridium difficile have to be isolated in single rooms with strict contact precautions. Patients infected with acute GE caused by other pathogens can be isolated in a multi-bed room if there is a private toilet.