Trichinosis

From Muppet Wiki

Trichinosis is the name of a character in "Swine Lake", performed in episode 213 of The Muppet Show. Trichinosis is the evil magician who has turned the beautiful princess into a pig. Trichinosis is also a common name for a disease by which the intestines are infected with worms, caused by eating uncooked or undercooked meat (especially pork).