Hookworms in dogs and cats, from the Companion Animal Parasite Council

Hookworm in dogs (info on cats is below)

Similar to tapeworms and roundworms, hookworms are intestinal parasites that live in the digestive system of your dog (or cat). The hookworm attaches to the lining of the intestinal wall and feeds on your dog’s blood. Its eggs are ejected into the digestive tract and pass into the environment through your dog’s feces.

Larvae (young hookworms) that hatch from hookworm eggs live in the soil and can infect your dog simply through contact with and penetration of the skin and through eating the hookworm larvae. It is common for hookworms to infect the host through a dog’s belly or feet as well as to be ingested during routine licking (cleaning).

How will hookworms affect my dog

Hookworms suck blood and therefore cause internal blood loss. They are a serious threat to dogs, especially young puppies that may not survive the blood loss without transfusions. In older animals the blood loss may be more chronic, and the pet may have diarrhea and show weight loss.

If you think your dog is infected with hookworms, call your veterinarian to schedule an appointment for evaluation, diagnosis, and safe, effective treatment.

How do I prevent my dog from getting hookworms?

Similar to steps for prevention of other intestinal parasites, it is essential to keep your dog’s surroundings clean and prevent the dog from being in contaminated areas.

Puppies should be treated for hookworms at 2, 4, 6, and 8 weeks of age, followed by administration of a monthly preventive treatment. Fecal examinations should be conducted 2 to 4 times during the first year of life and 1 to 2 times per year in adults. Nursing mothers should be treated along with their puppies.

Several heartworm preventive medications also treat hookworms. Consult your veterinarian for safe and effective prevention and treatment options.

Can humans be harmed by hookworms?

Some hookworms of dogs can infect humans by penetrating the skin. This is most likely to occur when walking barefoot on the beach or other areas where pets deposit feces. Infection usually results in an itching sensation at the point where the larvae enter the skin and visible tracks on the skin. The condition is easily treated but can cause mild to extreme discomfort in the affected person. One species of hookworm that infects dogs is known to develop in the human intestine, too, where it may cause disease.

Hookworm in cats

Similar to tapeworms and roundworms, hookworms are intestinal parasites that live in the digestive system of your cat (or dog). The hookworm attaches to the lining of the intestinal wall and feeds on your cat’s blood. Its eggs are ejected into the digestive tract and pass into the environment through your cat’s feces.

Larvae (young hookworms) that hatch from hookworm eggs live in the soil and can infect your cat simply through contact with and penetration of the skin and through eating the hookworm larvae. It is common for hookworms to infect the host through a cat’s belly or feet as well as to be ingested during the cat’s routine licking (cleaning.)

How will hookworms affect my cat?

Hookworms will cause bleeding into the intestinal tract resulting in internal blood loss. They may cause death in young kittens. Blood transfusions may be necessary to keep young animals alive long enough for medications that kill the worms to take effect. Adult cats may also suffer blood loss from hookworms and can have diarrhea and show weight loss.

If you think your cat is infected with hookworms, call your veterinarian to schedule an appointment for evaluation, diagnosis, and safe, effective treatment.

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