In the first published epidemiological report on an E. coli O157:H7 outbreak associated with steak products, the authors warned that restaurants should be warned about the increased risk of E. coli infection from undercooked steaks previously tenderized with blades and injections of brine or marinade.
That excellent advice came in 2005 when Minnesota public health investigators wrote about 12 confirmed cases of E. coli O157:H7 from non-intact, blade-tenderized frozen steaks that had been sold by door-to-door vendors in Minnesota, Michigan, Iowa, North Dakota and Kansas. Three of the victims were hospitalized, including a 52-year-old patient who was treated for 25 days after developing hemolytic uremic syndrome (HUS), and was discharged with “residual neurological deficits.”
Four years later and our national food safety law firm, Pritzker Olsen Attorneys, is investigating a possible steak E. coli outbreak associated with at least one large United States restaurant chain. Nothing official has come out as of yet, but we have been contacted by E. coli O157:H7 survivors who may have been infected by meat injected by tenderizing ingredients. The outbreak is believed to have reached multiple states.
These injections and other mechanical tenderizing techniques may enhance flavor but can be dangerous to consumers when brine is contaminated and when meat isn’t cooked well. Even some restaurant cooks may mistakenly believe that all steaks can be safely served rare in the middle. That’s true with intact, untouched steaks because any bacteria is on the surface and is easily killed.
But when steaks are tenderized with brine or mechanical blading, the processes can drive pathogens into the center of the meat, like hamburger. In those cases, an instant-read themometer should be used to ensure proper cooking.
Here’s what the 2005 report said: ” These processing methods create new challenges for prevention of O157 infections. Food regulatory officials should re-evaluate safety issues presented by nonintact steak products, such as microbiologic hazards of processing methods, possible labeling to distinguish intact from non-intact steaks and education of the public and commercial food estabshments on the increased risk associated with undercooked nonintact steaks.”
