brookcove
Posted : 3/22/2008 9:32:52 PM
I was a food service manager for many years. The inspections we underwent in this state were looking for food to be held at above 180 degrees (um, I think - not good with numbers and it's been 15 years), dishes to be santized with water above 190 degrees (ten minutes - and I remember this one), and prepared food had to be stored below 35 degrees as verified with a room temp thermometer placed in the fridge reaching that temp in less than ten minutes.
I understood that cooking actually killed bacteria, but that prepared food was at risk because of inevitable cross-contamination. The sanitation of dishes was a huge deal because we didn't have a dishwasher - we washed by hand, so we had a seperate santizing tank on our dishwashing sink. We had to scrub that thing with a special solution between every batch of dishes, and there was a heater that had to be taken apart and put back together to do it (very similar to a stock tank heater, but bigger). There was a thermometer on the opposite side of the tank from the heater that had to reach 190 degrees F before you could start washing and what a pain that was during rush times!
I don't think freezing will kill staph, either, but I don't think it takes a lot of heat to kill it. And, oddly, strong acid will kill it - lemon, vinegar, hydrochloric like in stomach acid. Every bug has it's limits - environmentally persistent ones like the cold virus and coccidea tend to be limited in their ability to mutate into something really evil. If a bug becomes very dangerous, many times it will give up persistence - for instance, salmonella and e-coli bacteria can be discouraged from multiplying by simply encouraging a state of probiotic health in the gi.
We have yet to encounter a true "superbug" - one that is at once persistent (and ispo facto highly contagious), adaptable, and virulent. Or, if we have, we haven't been told yet!