This canine intestinal parasite is quite prevalent throughout the U.S., especially in adult dogs. To become infected with whipworm, dogs accidentally eat whipworm eggs (while grooming, for example).

Dogs become infected by accidentally eating whipworm eggs (while grooming, for example).

The life cycle of canine whipworms in dogs:

After being swallowed, whipworm eggs starts to hatch in the stomach. The larvae invade the wall of the small intestine, where they continue to grow.

Eventually (in approximately 2 ½ months), adult whipworms attach to the lining of the large intestine and cecum (a blind pouch where the small intestine meets the large intestine), where they feed on the dog’s blood.

Adult canine whipworms lay eggs that are expelled in the feces of infected dogs. The eggs must remain in the soil for 2 to 4 weeks to mature before they can infect new hosts.

Whipworm as Health risk to dogs

Like hookworms, dog whipworms attach to the lining of the intestines and suck the dog’s blood, but they are generally less harmful and lead to fewer health problems.

A small number of whipworms may not cause any signs, but a heavier infection can lead to diarrhea, weight loss, blood loss and anemia.

Health risk to people: zoonosis

Canine whipworms rarely infect people.

Whipworm infections in humans are usually caused by a different (non-canine) species of whipworm which otherwise known as Trichuris trichiura.

Canine whipworm treatment
Because most canine worm treatment products are not effective against whipworms, extra care must be taken when choosing a dog dewormer for whipworms.

Fenbendazole is highly recommended and is commonly used to control these parasites.