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Dog Whipworm Infestation

Whipworm infestation in dogs can cause diarrhea and anemia. Dogs with compromised immune systems are more susceptible to be affected by the worms. Read on and find out more about the symptoms and treatment of canine whipworms.

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The whipworm (Trichuris vulpis) is a common dog intestinal parasite.

The front part of the worm is long and threadlike, but the posterior end is thicker, thus giving it the appearance of a whip.

An adult worm can grow to a length of 2 to 3 inches (50 to 76 mm).

Life Cycle of Whipworm

The life cycle of the whipworm is relatively simple compared to other intestinal worms such as hookworms or roundworms.

  • Adult female worms lay eggs in the host's intestines and the eggs are passed in the feces.
  • Dogs get infected with whipworms by ingesting food or water contaminated with whipworm eggs.
  • Once ingested, the eggs hatch into larvae inside the dog's gut.
  • In a little less than three months, the larvae mature into adults in the intestines, where they fasten to the wall of the gut and feed on blood.
  • Adult female worms in the intestines lay eggs which are passed in the feces, and the life cycle of the whipworms is repeated.

Symptoms of Dog Whipworm Infestation

Dogs with mild whipworm infestation show little or no symptoms at all.

Heavy whipworm infestation can cause diarrhea, which can be sudden (acute), or on and off over a period of time (chronic). There is an urgency for the dog to relieve himself and while doing so you can see the dog straining. This is the result of an inflammation of the intestinal wall (colitis). Large amounts of mucus are produced by the inflamed intestine; therefore, the stool is usually bloody and mucoid-like. Sometimes hemorrhage into the intestine occurs, resulting in anemia.

Dogs with a heavy infestation may also lose weight and become weak. Puppies will have stunted growth.

Diagnosis and Treatment of Dog Whipworms

Diagnosis of whipworm infestation is by finding eggs in stool samples. However, female whipworms lay fewer eggs than other worms, and there are long periods during which eggs are not shed. Therefore, finding eggs in feces is more difficult, and multiple samples may be needed to get a definite diagnosis.

Heavy whipworm infestations can lead to serious health problems in dogs such as chronic colitis and anemia. Therefore, it is important to use deworming medicines to eradicate the worms.

There are several dewormers that are effective against whipworms (e.g. Panacur, Drontal Plus). However, since the whipworms live in a dog's colon, it is more difficult to attain high drug concentration in that part of the body. As a result, it is advisable to have a second deworming treatment three weeks after the first, and a third treatment in three months.

Prevention of Dog Whipworms

Since the eggs of whipworms can remain infective for up to 5 years, public sanitation is very important to prevent dog whipworm infestation. Yards, dog parks, and kennels should be cleaned daily. All fecal material should be collected and removed.

In addition, since whipworm eggs are hard to detect in fecal examinations, routine annual fecal examinations should be carried out to make sure that your dog is not infested.

The drug Interceptor, which is used to prevent heartworms, can also control and prevent whipworms in dogs.
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