An Tech II: Toxocara canis - Canine Roundworms

What is the common name for “Toxocara canis” ?

Canine Roundworm.

What are the hosts for “Toxocara canis”?

Canines.

What is the pre-patent period for canine roundworm?

21-35 days.

What are the clinical signs for “Toxocara canis”?

Ill, unthriftiness, pot-bellied appearance, worms in vomitus, and lung/liver damage.

How do we diagnose canine roundworm?

Fecal float.

How would you describe Canine roundworm ova?

Spherical, unembryonated, deeply pigmented center, rough, ropey outer shell appearance, and yellowish-brown in color.

How can “Toxocara canis” be transmitted?

A) Ingestion of larvated egg (L2).

B) Ingestion of paratenic host.

C) Transplacental

D) Transmammary

All of the above.

Is Toxocara canis zoonotic?

Yes.

What is Toxocara canis a causitive agent for?

Visceral and Ocular Migrans (VLM and OLM).

Canine roundworm is rarely found in dogs over 1 year of age because of immunity.

True.

Dogs can get canine roundworm from the environment.

True.

What is the adult Toxocara canis general size?

3-18 cm.

If pregnancy occurs, the larvae reanimate and migrate from the mother to the developing fetuses liver.

Somatic.

After birth, the larvae migrate from the liver to the lungs, coughed up and swallowed to return to the small intestines to mature.

Tracheal.