Norovirus is the most common cause of viral gastroenteritis in dogs.
Norovirus , sometimes referred to as the winter vomiting bug in the UK and Ireland , is the most common cause of viral gastroenteritis in humans . The species causes approximately 90 % of epidemic nonbacterial outbreaks of gastroenteritis around the world , and may be responsible for 50 % of all foodborne outbreaks of gastroenteritis in the United States .