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Norovirus: pathogen and clinical presentation

Pathogen

Norovirus is a small, spherical virus that causes food poisoning. Noroviruses are classified into five groups according to their genetics, and it is groups I and II that infect humans. Norovirus is very contagious; 10 to 100 virus particles are enough to cause an infection. The virus multiplies inside cells in the human intestines.

Clinical presentation

The time from infection until the development of symptoms - that is, the incubation period - is 24 to 48 hours. The principal symptoms are vomiting, diarrhea, and abdominal pain, with vomiting and diarrhea occurring several times a day, sometimes more than 10 times a day. Symptoms subside in three to four days but can be prolonged in the case of severe dehydration.

If you develop these symptoms, it is important to get checked at a hospital as soon as possible.