Chinese authorities have been testing swine for the H7N9 avian influenza but have not found any instances of the virus in pigs so far, writes veterinarian Albert Rovira of the University of Minnesota Veterinary Diagnostic Laboratory. H7N9 has sickened at least 122 people and killed 24. U.S. laboratories monitor swine for several influenza strains, and there have been no known cases of H7N9 in U.S. pigs, birds or people to date, Dr. Rovira notes. Despite this, pork producers must adhere carefully to biosecurity practices, he advises.

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