NOROVIRUS genus of RNA viruses of the family Caliciviridae, ? responsible for a large percentage of cases of gastroenteritis due to food poisoning. It is acquired by the intake of particles of feces, sometimes included in vegetables irrigated with sewage or poorly treated, and by coprophagia or unhygienic eschatological relationships. Some synonyms, words or similar expressions may be coprophagia implying a high risk of acquiring norovirus, hepatitis and typhoid fever