1319 Archdale Drive
Charlotte, NC 28217

704-552-2333

Informational Articles

Internal Parasites in Dogs

This handout is designed to give you an overview of some of the internal parasites that can infect your dog.

 Are there different sorts of internal parasites or worms?internal_parasites-1

There are several types of internal parasites that cause problems in dogs. These include nematodes or roundworms,of which Toxocara canis (intestinal roundworm) and Dirofilaria immitis (heartworm) are the main examples, and cestodes or tapeworms of which Dipylidium caninum, Taeniaspecies andEchinococcusspecies are important examples. Ancylostomaspecies (hookworms) are also common internal parasites in many parts of the United States.

Heartworm Disease in Cats

What causes heartworm disease?

Heartworms are a blood-borne parasite called Dirofilaria immitis that reside in the heart or adjacent large blood vessels of infected animals. The female worm is 6 to 14 inches long (15 to 36 cm) and 1/8 inch wide (5 mm). The male is about half the size of the female. Heartworm disease is much more common in dogs.

"...incidence of heartworms that is far greater than previously thought."

Internal Parasites in Cats

This handout is designed to give you an overview of some of the internal parasites that can infect your cat.

Are there different sorts of internal parasites or worms?

There are several types of internal parasites that cause problems in cats. These include nematodes or roundworms, of which Toxocara cati, Toxascaris leonina (intestinal roundworm) and Dirofilaria immitis (heartworm) are the main examples, and cestodes or tapeworms of which Dipylidium caninum, Taenia species and Echinococcus species are important examples. Ancylostoma species (hookworms) are also common internal parasites in many parts of the United States and Canada.

Page 4 of 4