Contagious Gastrointestinal Virus In Dogs. Parvovirus is a very contagious virus that can cause gastroenteritis in dogs and in some cases, can be fatal. Parvo is a highly contagious viral disease that attacks dogs' gastrointestinal system.
It can be transmitted from contaminated food or water to humans and the infection can rapidly spread in the human population by fecal oral rate. While these may be mild if your dog gets into something in the yard, they may also be a sign of a deadly virus. This is a frightening fact, because your pet could become ill by interacting with another that doesn’t seem sick at all.