Heartworms in the USA

Yes! it may be hard to imagine, but there is a parasite that actually will live in your dog's or cat's heart. These long, white, round worms will live for several years during which time they can cause serious, even life threatening, illness in your pet.

The map below shows how widespread heartworms are throughout the United States. They have been reported in every state within the continental U.S.A.

Heartworm Infection 2003

Canine Heartworm Disease | Canine Heartworm Lifecycle | Canine Heartworm Treatment
Feline Hearworm Disease | Feline Heartworm Lifecycle
Heartworms in the USA | Preventative Comparisons