Cerebral Larva Migrans Caused by Baylisascaris spp. in a Free-ranging North American Porcupine ( Erethizon dorsatum ).

A free-ranging North American porcupine ( Erethizon dorsatum ) from Utah, US, exhibited neurologic symptoms and was submitted for necropsy. Histologic examination of the brain revealed severe encephalitis with an intralesional nematode larva consistent with Baylisascaris spp. Neurologic larva migrans had not been reported in free-ranging porcupines, or from wildlife in Utah.