Cat Hookworms (Ancylostoma) Symptoms and Treatments

There are 4 species of hookworm that afflict the cat. Hookworms are not as common in cats as they are in dogs. They are most prevalent in areas of high temperature and humidity, where conditions are favorable for rapid development and spread of larvae.

Hookworms are intestinal parasites of the cat. Their name is derived from the hook-like mouthparts they use to anchor to the lining of the intestinal wall. They are only about 1/8" (2-3 mm) long and so small in diameter that they are barely visible to the naked eye.

The typical signs of acute hookworm infestation are anemia and diarrhea. With a heavy infestation, stools might be bloody, wine-dark or tarry-black, but this is uncommon. A hookworm infestation can be fatal in very young kittens. Cats who show severe clinical signs are usually hospitalized and treated to restore fluid and electrolyte abnormalities and potentially may require blood transfusions if extreme anemia develops. A disease in humans called cutaneous larvae migrans (creeping eruption) is caused by the hookworm, A.brailiense.

Fortunately, treatment is safe, simple, and relatively inexpensive. After administration of the deworming medication (called an anthelmintic), the adult worms are killed. At least two treatments are needed; they are typically performed at 2-3 week intervals. Ideally, kittens are treated for worms during their kitten vaccination series. Since the cat's environment can be laden with hookworm eggs and larvae, it may be necessary to treat it with a chemical to kill them. There are several available formulations which are safe to use on grass.

Next article: Some Cat Uncommon Worms - Pinworms, Trichinosis, Whipworms, Flukes, Heartworms, Lungworms, Stomach worms, Bladder worms