In 1846 Joseph Leidy discovered that the worm trichina is found in this animal
Under a microscope, these specks turned out to be tiny cysts housing 
worm ... of trichinae in meat for human consumption was in 1846 when Joseph 
Leidy,... [DOC] [TLE] Trichinosis - USGS Publications Warehouse - U.S. Geological Survey [PAR] ease have had their origins in wild animal populations (Daszak and others, ...... 
the trichina worm, this parasite is considered to be the ....