Parasitic worms found in man's brain after he likely ate undercooked bacon

Three brain scan images depicted side by side and labelled a to c. Lesions containing the parasite Taenia solium are highlighted by arrows in white, red, orange and yellow.

Doctors in the U.S. got a nasty surprise when they discovered that a man visiting a clinic for migraines had parasitic worms growing in his brain. 

The 52-year-old man was infected with the larvae of Taenia solium, a tapeworm that normally infects pigs. This parasite can infect humans who inadvertently ingest pork that has not been thoroughly cooked, or those who consume poop containing the worm's eggs. This poop may come from a person already infected with the parasites, for instance.