Mary It's 3 a.m., Is that a Parasitic Worm in Your Cheek? (Op-Ed) Opinion When in doubt, ask a parasite expert. Opinion Misdiagnosed and Untreated Heartworm in Cats Can Be Fatal Heartworm disease is a growing epidemic in the United States, and it is especially misdiagnosed in cats. By Donna Bucci Published 7 December 11