@dr_batista_usmle: Viral Watery Diarrhea: Think RAN The main viral causes of watery diarrhea are Rotavirus, Adenovirus and Norovirus: RAN, like diarrhea that ran. Rotavirus is the most important global cause of infantile gastroenteritis. Norovirus, the Norwalk virus, is a single-stranded positive-sense RNA virus known for outbreaks on cruise ships. #ViralGastroenteritis #Rotavirus #Norovirus #Microbiology #USMLE #USMLEStep1