Also likely why steaks were included in the recall.
http://www.foodsafetynews.com/2012/0.../#.UGr742t5mK0
Quote:
The beef steak recall was limited to the Costco located at 13650 50 Street in Edmonton. #The steaks were sold between Sept 4 and Sept. 7, 2012. The four E. coli illnesses traced back to the Strip Loins sold at that location were by the Alberta Health Services.
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One focus of the Costco investigation is the meat tenderizing process, which might have driven the pathogen further into the meat.
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Commercial meat tenderizing machines have pins, if there was any bacteria it would be on the surface and easily killed even on a blue rare steak, but the pins could drive it into the middle.