Pork can be safely cooked to a slightly lower temperature provided that the internal meat temperature is at least as hot for at least as long as listed in the USDA table below.
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In 1835, James Paget, a first-year medical student, first observed the larval form of T. spiralis while witnessing an autopsy at St. Bartholomew’s Hospital in London.
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Pork: Freezing cuts of pork less than 6 inches thick for 20 days at 5 °F (−15 °C) or three days at −4 °F (−20 °C) kills T. spiralis larval worms; but this will not kill other trichinosis larval worm species, such as T. nativa, if they have infested the pork food supply (which is unlikely).
Friedrich Albert von Zenker (13 March 1825, Dresden – 13 June 1898, near Plau in Mecklenburg) was a German pathologist and physician, celebrated for his discovery of trichinosis.