Hamburgers: fresh is not the same as safe
Posted: July 19th, 2010 - 7:43am by Doug Powell
‘Our restaurant's burgers are safe to eat undercooked: The meat is fresh and ground in-house.’
This is wrong, dangerous, and nothing more than food porn, the wishful thinking that bacteria will avoid certain products if prepared with enough
manual labor and love.
Bacteria don’t care about love.
Shamona Harnett of the Winnipeg Free Press reported the all-too-common chat with her server as she tried to order a burger – she went with well-done. And she urged cooks to use a food thermometer to ensure the burger has reached 160 F, which is also an effective way to ensure the cook doesn’t overcook the burger. Thermometers make people better cooks.
Harnett then goes on to say that “experts say consumers should wash lettuce -- even if it's labelled pre-washed.”
No they don’t. An expert panel concluded,
"Leafy green salad in sealed bags labeled 'washed' or 'ready-to-eat' that are produced in a facility inspected by a regulatory authority and operated under cGMPs, does not need additional washing at the time of use unless specifically directed on the label. The panel also advised that additional washing of ready-to-eat green salads is not likely to enhance safety. The risk of cross contamination from food handlers and food contact surfaces used during washing may outweigh any safety benefit that further washing may confer."
Food safety is not simple.


Comments
UNC MD MPH says:
Commercially ground beef is made from multi-ton lots of "trim" and primal cuts. Bacteria contaminate surfaces, not volumes, and the highly fragmented nature of trim, coupled with the huge quantity, creates a huge surface-to-volume ratio. The risk of a few tainted fragments contaminating the entire multi-ton lot is unacceptable. Add to that the time spent handling, packing, and preparing, during which the inoculum may proliferate. Clearly, commercially ground beef should be cooked, and cooked well.
In contrast, steak tartare, kibbeh nayyeh, kitfo, gored gored, and rare hamburgers are usually prepared on-the-spot from single small cuts of beef, and then served immediately. These should have a correspondingly reduced risk. A Dutch study* found an E. coli O157:H7 prevalence of 0.3% in steak tartare patties, and in the majority of those, they found 1 cfu. Whether that low risk is acceptable is a topic for study, discussion, and ultimately, personal choice.
*http://rivm.openrepository.com/rivm/bitstream/10029/9409/1/257851003.pdf
Posted on July 19th, 2010 - 1:32pm
Andrew says:
Posted on July 19th, 2010 - 4:37pm
Theo Bromine says:
Posted on July 20th, 2010 - 8:06pm
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