Antigenic drifts Antigenic shifts of viruses Virus infection due to contaminated water Food-borne virus diseases The cause of infectious diarrhea were usually told to be bacterial or parasitic. Only recently, beginning with the 70 decade of 2000 better diagnostic methodes have proved that food-borne diseases caused by virus are very frequent. Thats the reason why often new strains of influenza arise. These strains are called serotypes because they can be distinguished by serological agglutination tests. It is the most common type of influenza outbreaks in humans.
Rotaviruses belong to the group of the reovirus.
They are 70 nm in diameter and resemble wheels with a central axel and radiating spokes. Rotaviruses are the major agent of non-bacterial diarrhoeal diseases with great risk to infants and young children. Transmission occurs commonly through water. Canine parvovirus causes enteritis and miocarditis in dogs. Some entero viruses Infection occurs through faecal contamination of food, water and air.