Top of the page. Topic Overview What are noroviruses? What causes infection with noroviruses? You may become infected by: Eating foods or drinking liquids that are contaminated with norovirus.
Shellfish and salad ingredients are the foods most often infected with the viruses. Food other than shellfish may be contaminated by food handlers. Touching surfaces or objects contaminated with norovirus, and then placing your hand in your mouth. Having direct contact with someone who is infected. For example, if you are a caregiver or share foods or utensils with someone who is ill, you may become infected.
What are the symptoms? How are infections with noroviruses diagnosed? How are infections with noroviruses treated? How can you prevent infection with noroviruses?
You can help prevent infection by doing the following: Wash your hands often, especially after using the washroom and before handling food. Wash fruits and vegetables and steam oysters before eating them. If you suspect that your drinking water is contaminated, boil water for 1 minute 3 minutes at elevations above 6, feet.
Then cool and refrigerate it. Water filters will not remove noroviruses. Cooked foods may also be contaminated though handling by an infected individual.
Prevention of outbreaks in institutions depends on good food handling practice, and compliance with hand washing on the part of staff. Staff who display symptoms of nausea, diarrhea or vomiting must be excluded from work, and should not return to work until 48 hours after these symptoms subside. Hospitals and nursing homes also maintain surveillance for clusters of gastroenteritis, so that more stringent precautions may be taken if there is evidence of transmission within the facility.
Healthcare professionals who take care of patients with symptoms of Norwalk virus should wear a gown and gloves. Special attention to handwashing with soap must be practiced by everyone. Patient movement through the hospital should be minimized. Immunity to Norwalk and Noroviruses is strain-specific and temporary, so everyone should take precautions to prevent the spread of Norwalk virus to others. Frequent hand washing with soap and running water is important, especially after visits to the washroom and before handling food.
Prompt disinfection of contaminated surfaces and soiled clothing will also help prevent the spread of the disease. Regular household bleach based cleaners are effective. Thorough cooking destroys Norwalk virus, so make sure the food you eat is cooked completely. If you suspect that the water supply is polluted while travelling, choose to drink pasteurized milk or bottled beverages without ice.
Where are Noroviruses Found? This content does not have an English version. This content does not have an Arabic version. Overview Norovirus infection can cause the sudden onset of severe vomiting and diarrhea. Request an Appointment at Mayo Clinic.
Share on: Facebook Twitter. Show references Matson DO, et al. Clinical manifestations and diagnosis of norovirus and related viruses. Accessed Nov. Blacklow NR. Epidemiology of viral gastroenteritis in adults. Longo DL, et al. Follow these tips to prevent norovirus at youth camps. Skip directly to site content Skip directly to page options Skip directly to A-Z link.
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