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If acclaimed authors Upton Sinclair ( The Jungle ), Jeremy Rifkin ( Beyond Beef ) and John Robbins ( Diet for a New America ) haven’t given you enough reasons over the last century to be wary of the meat industry, then a year-long investigation by the Kansas City Star may do the trick.

Mike McGraw kicks off the KC Star’s investigative series by introducing Margaret Lamkin, who has been forced to wear a colostomy bag for the rest of her life, after a medium-rare steak she ordered three years ago at Applebee’s was contaminated with a pathogen. The resulting illness destroyed her colon.

Of course we already know about E. coli and other food-borne pathogens; people have gotten sick from everything from spinach to peanut butter. But the news here is that what sickened Lamkin wasn’t just the meat, but a process the industry uses to tenderize it. McGraw explains :

The Kansas City Star investigated what the industry calls “bladed” or “needled” beef, and found the process exposes Americans to a higher risk of E. coli poisoning than cuts of meat that have not been tenderized.

… Although blading and injecting marinades into meat add value for the beef industry, that also can drive pathogens – including the E. coli O157:H7 that destroyed Lamkin’s colon – deeper into the meat.

By using this process (which according to the story, 90 percent of processors will use, depending on the cut), people are at a greater risk of exposure to life-threatening illness. And consumers have no way of knowing whether their meat has undergone this process.