Intestinal parasites, dog whipworms
Intestinal parasites, dog whipworms, are about 1/4 inch ( 6
mm ) long. Whipworms (Trichuris vulpis, Trichuris campanula)
are common in dogs and found throughout the United States
Whipworms get their name from the whip-like shape of the
adult worms.
Dogs become infected by ingesting food or water
contaminated with whipworm eggs. The eggs are swallowed,
hatch, and in three months, the larvae mature into adults.
Dog whipworms live in the large intestine and cecum (a small
'dead-end' portion of intestine lying at the junction of
the small intestine and large intestine).
There they cause severe irritation to the lining of those
organs.
Whipworms burrow their mouths into the intestinal wall and
feed on blood.
This results in watery, bloody diarrhea, weight loss, and
general debilitation. They are one of the most pathogenic
worms found in dogs.
Adult worms lay eggs that are passed in the feces. The eggs
must remain in the soil for about a month before they mature
and are capable of causing infection.
The eggs are very resistant to drying and heat, so they can
remain viable in the dog's environment for years.
Whipworms in dog are diagnosed by finding eggs with a
microscopic examination of the stool. However, multiple
samples are often required because these parasites pass
small numbers of eggs on an irregular basis.
Any dog with chronic diarrhea can be reasonably suspected to
have whipworms. It is an accepted practice to treat for
whipworms based on assumption of infection.
There are several drugs that are very effective against
whipworms. Two treatments are needed at a 3-4 week interval.
Reinfection is such a problem, that it is advisable to treat
again every 3-4 months.
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Dog whipworms are not nearly as common now because of the
widespread use of many types of heartworm prevention
products.
Most heartworm prevention products will contain an
ingredient that prevents the infection of whipworms.
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