Quote: I also asked him about the freezing of pork. I have read that it is necessary to freeze it for 30 days prior to smoking it. Les told me if cooking it at a low temperature it is necessary, but if cooking it at a higher temperature it is not. But he again said in most cases a healthy individual will have no problem eating smoked pork that was not frozen.
I have to wonder what Les meant by Low and High temperature....See the USDA /FDA regulations below... I was taught that the main worry in Pork was Trichinae Spiralis, the parasite that enters the muscles and causes Trichinellosis (Trichinosis). Although there have been very few cases, " in commercial Pork " since the late 40's, there is still a remote possibility that commercially raised hogs can be infected. The main cause was hogs eating unprocessed food scraps and garbage...Common in Home Farms of the past. All food refuse fed to commercial hogs for the last 60 years, has to be recooked to sterilize it. However, there may always be unethical farmers that cut corners and cost by feeding hogs whatever. The Trichinae is killed by heating the pork to an IT of 126°F and held there for at least 6 minutes and at 140° or higher the bug is killed in 2 minutes or less. So, for our Smoking purposes, the low and slow smoking at 225° to 145+, and Cold/Cool smoking of Nitrite Cured meats to 145°F, should represent no issue at all.
The only remaining problem is Cured/Dried Pork that will never be cooked. It is necessary to kill the Trichinae by Freezing before processing and consumption.
Years ago the freezing for 30 days was a common recommendation but that was typically in Home Refrigerator/Freezers. The USDA requirement for freezing to kill Trichinae has drastically changed as further testing was done...Hours not Days...
Freezing - Experiments have been performed to determine the effect of cold temperatures on the survival of
T. spiralis in pork. Predicted times required to kill trichinae were 8 minutes at -20° C (-4° F), 64 minutes at -15° C (5° F), and 4 days at -10° C (14° F). Trichinae were killed instantaneously at -23.3° C (-10° F). The U.S. Department of Agriculture's Code of Federal Regulations, requires that pork intended for use in processed products be frozen at -17.8° C (0° F) for 106 hours, at -20.6° C (-5° F) for 82 hours, at -23.3° C (-10° F) for 63 hours, at -26.1° C
(-15° F) for 48 hours, at -28.9° C (-20° F) for 35 hours, at -31.7° C (-25° F) for 22 hours, at
-34.5° C (-30° F) for 8 hours, and at -37.2° C (-35° F) for 0.5 hours. These extended times take into account the amount of time required for temperature to equalize within the meat along with a margin of safety.
Here is the USDA text in it's entirety...
https://www.aphis.usda.gov/vs/trichinae/docs/fact_sheet.htm