While cats can be infected with a type of heartworm called *Dirofilaria immitis*, they are not the primary host for this parasite. This means they don't develop the severe, life-threatening condition that heartworms cause in dogs.
It's important to note that although cats are not susceptible to heartworm disease, they can still get infected with other types of parasites that can cause health problems. It's essential to keep your cat on a regular parasite prevention program, including deworming medications, as directed by your veterinarian.