Fri, May 22nd, 2009

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WASHINGTON – Genes included in the new swine flu have been circulating undetected in pigs for at least a decade, according to researchers who have sequenced the genomes of more than 50 samples of the virus.

Researchers led by Rebecca Garten of the Centers for Disease Control and Prevention studied samples of the flu isolated in Mexico and the United States.

The findings suggest that in the future pig populations will need to be closely monitored for emerging influenza viruses, according to the report, released Friday by the journal Science.

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