Thursday, January 10, 2013

New strain of norovirus spreads around the world

In addition to this year's Seasonal Flu, we also have this Norovirus circulation.  That's a double whammy. 

January 09, 2013
A new strain of the winter vomiting disease norovirus has spread to France, New Zealand and Japan from Australia and is overtaking all others to become the dominant strain in Britain, health officials said on Wednesday.

The norovirus variant, known as Sydney 2012, was identified in a scientific paper last week and Britain's Health Protection Agency (HPA) said genetic testing showed it was now causing more cases in England and Wales than other strains.

Sydney 2012 does not carry worse symptoms than others but, like other norovirus strains, it can cause violent and projectile vomiting, diarrhea and sometimes fevers, headaches and stomach cramps.

Norovirus cases have risen earlier than expected this winter in Britain, across Europe, Japan and other parts of the world.

"The emergence of a new strain does not mean that it causes more serious illness, and managing outbreaks and those with the illness remains the same," said David Brown, director of the virology reference department at the HPA.
"Noroviruses mutate rapidly and new strains are constantly emerging. At the start of the season it is normal for outbreaks to be caused by a range of different strains. However, as the season progresses, particular strains are more successful and become dominant."
There is no specific treatment for norovirus infection other than to let the illness take its course and try to stay hydrated by drinking regularly. Symptoms usually last around two days.

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