In 1846 Joseph Leidy discovered that the worm trichina is found in this animal
[DOC] [TLE] Shelly Amieva - Stanford University [PAR] [4] Molecular studies have found the greatest genetic variability for T. spiralis in 
East Asia, ... -1846: *Philadelphia: Joseph Leidy finds Trichinella cysts in his pork 
dinner and ... Virchow discovered that the worms matured in the small intestine.