http://www.huffingtonpost.com/2012/07/31/onion-recall-expands_n_1724987.html?ref=topbar "Gills Onions, which provides diced, slivered and whole-peeled onions and celery mix to several companies, has called a voluntarily recall on those products with a use-by date of August 3 or before, citing a possible listeria contamination...
Whole Foods, Trader Joe's, Weis, Publix and Wegman's stores across Arizona, California, Colorado, Illinois, Montana, New York, Oklahoma, Oregon, Pennsylvania, Texas, Utah, and Washington, plus Canadian provinces Alberta, British Columbia and Ontario..."