Roundworms (Toxocara species) are active in the intestines of puppies, often causing a pot-bellied appearance and poor growth. You may not suspect that your puppy has roundworms until you find some either in vomit or stool. Roundworms look like spaghetti and can grow up to seven inches in length. Female roundworms can produce 200 thousand eggs in a day, eggs that are protected by a hard shell and can exist in the soil for years. Dogs become infected by ingesting worm eggs from contaminated soil. The eggs hatch in the intestine and the resulting larva are carried to the lungs by the bloodstream. Roundworms do not typically infest adult dogs and cats. However, the larvae can encyst in body tissue of intact female and activate during the last stages of pregnancy to infest puppies. Worming the mother has no effect on the encysted larvae and cannot prevent the worms from infecting the puppies.
A fecal test must be performed to find intestinal parasites. The veterinarian will look for roundworm eggs under the microscope.
To rid the body of roundworms, a deworming medication is given. Many flea control and/or heartworm prevention products provide a monthly deworming which is especially helpful in minimizing the risk of infection.
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