Healthy Dogs

Whipworms and Parasites in Dogs

Other Worm Parasites

Pinworms

Pinworms are sometimes a concern to families with pets and children. However, dogs and cats are not a source of human pinworm infection, because they do not acquire or spread these parasites.

Trichinosis

This is a disease acquired by ingesting uncooked pork containing the encysted larvae of Trichina spiralis. In humans, only a few cases are reported each year. The incidence is probably somewhat higher in dogs. Prevent trichinosis by keeping your dog from roaming, especially if you live in a rural area. Cook all fresh meat for you and your dog.

Lungworms

Lungworms are slender, hairlike parasites about 1 centimeter long. There are several species of lungworm that affect dogs. Capillaria aerophila is acquired by ingesting eggs or a transport host, such as snails, slugs, or rodents. These parasites reside in the nasal cavity and upper air passages, producing a mild cough. Filaroides species produce a tracheal and bronchial infection that tends to be a kennel-related problem, especially in Greyhounds.

Most dogs with lungworms have mild infections and do not show clinical signs. Heavily infested dogs (usually under 2 years of age) may have a persistent dry cough, weight loss, and exercise intolerance.

Diagnosis is based on clinical signs, a chest X-ray (not always positive), and identification of the eggs or larvae in the stool or in respiratory secretions. Bronchoscopy on a dog with a Filaroides infection may reveal small nodules in the wall of the trachea. Larvae may be seen peeking out of these growths. Treatment with Panacur (fenbendazole) is often needed for extended periods of time.