The viruses causing gastroenteritis are -a) Rotavirusb) Norwalk virusc) Adenovirusd) Hepatadenoviruse) Enterovirus

□ Viruses that are important causes of gastrointestinal infection are - rotaviruses , enteric adenoviruses (especially, serotype 40 & 41) Q, noroviruses, sapoviruses, astroviruses & possibly toroviruses - Fields virology  □ Viruses causing diarrhoea  RotavirusesQ AstrovirusesQ AdenovirusesQ Calcivi ruses Coronaviruses Norwalk group virusesQ Enteroviruses  Viral infections causing diarrhoea (Current Diagnosis & Treatment in Gastroenterology  Rotavirus & Norwalk virus are the two most common agents in viral diarrhoea in children & adults, respectively Rotavirus : The disease occur primarily in children aged 3-15 months , with infection less common after 2 years of age. Adult can develop mild infection. Typically a childe develops vomiting, followed by profuse, watery diarrhoea. Dehydration may develop rapidly in chidren & contributes significantly to the se%rerity of the illness. Rotashieldj a live oral vaccine initially approved for the prevention of rotavirus infection, was withdrawm from the market because of a possible increased risk of intussusception Norwalk virus : The clinical spectrum of disease is varied, although all cases are mild. The duration of illness is usually 24-48 hours