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Norwalk virus,

highly contagious viral disease caused by infection with an RNA virus of the genus Norovirus. The virus causes acute gastroenteritis, usually one to two days after infection; typical symptoms are abdominal pain and cramps, diarrhea, vomiting, and a low-grade fever. Dehydration may result if enough liquids are not consumed to replace lost fluids. There is no treatment for norovirus, which usually lasts one to three days and does not result in severe illness, but it may become life-threatening if an infected person becomes dehydrated. Dehydration may be treated by administering fluids intravenously. A person typically remains contagious for several days after the acute illness has ended.

Norovirus is transmitted by the fecal-oral route, most commonly through person-to-person contact a result of poor hygiene or through food contaminated by an infected food preparer or handler. Ingestion of uncooked shellfish harvested from contaminated waters or of contaminated drinking water may also transmit the disease. Outbreaks most commonly occur in settings where individuals are in close quarters, such as hospitals, nursing homes, and retirement homes, vacation resorts and cruise ships, and child-care centers and schools, and spread rapidly; most epidemic viral gastroenteritis is caused by a Norovirus. The virus can persist in the environment on some surfaces for a relatively extended period of time, and is resistant to disinfection by alcohol- or detergent-based agents, but soap and water is effective in blocking the spread of the disease. The disease was first identified as result of an outbreak in a Norwalk, Ohio, elementary school in 1968.

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The winter vomiting virus ripping through hospitals across the country has seen 10 people fall ill at Arrowe Park.
A Birmingham hospital ward was closed last night after a suspected outbreak of winter vomiting virus.
We've just finished a miserable winter, complete with the dreaded winter vomiting virus, now bird flu has arrived.
The Victoria Infirmary in Glasgow is only accepting 999 emergencies after the bug, nicknamed the winter vomiting virus, swept through wards.
The bug, also known as the winter vomiting virus, has also affected two wards at the Worcestershire Royal Hospital, Avon Three and Laurel Three.
University College Hospital Galway is one of a number of across the country battling an outbreak of the winter vomiting virus and has called on all visitors to adhere to hygiene guidelines and visiting restrictions.
It is publishing weekly data on its Winterwatch website, collating NHS data in areas such as flu, winter vomiting virus -and ambulance and Accident and Emergency performance.
Incidentally, for the record, the fact that I was unavailable for comment was because I was bedridden with the winter vomiting virus for three days, and I am rather surprised that I was not allowed to comment.
8 Health: Dr Gareth advises on shingles, vitamin B12, taking aspirin and what to do if you get the winter vomiting virus.
SCIENTISTS are ready to begin human trials for a plant-based vaccine to combat the winter vomiting virus.
People visiting family and friends in Dewsbury District Hospital and Pinderfields General Hospital, Wakefield, have been temporarily restricted to control the spread of a winter vomiting virus which causes diarrhoea and sickness.
This is the era of superbugs but most members of the public will simply be in contact with the common or garden variety of bugs and viruses such as colds, flu, tummy bugs and the winter vomiting virus.