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Dogs may get internal parasites frequently referred to as worms. The most common are the roundworms that infest most puppies and tapeworms when flea infestations are high.
Roundworms and tapeworms can be seen without the help of a microscope, but other worms are not so easily diagnosed. Adult whipworms can be seen in the stool when the infestation has already caused symptoms or weight loss in the dog.
Early diagnosis of the presence and species of intestinal parasite is important. Stool samples should be taken to the veterinarian for microscopic examination if worms are suspected. Most veterinarians include the stool check as part of the annual health examination.
Most worm infestations may cause these symptoms: diarrhea, perhaps with blood in the stool; weight loss; dry hair; general poor appearance; and vomiting, perhaps with worms in the vomitus. However, some infestations cause few or no symptoms; in fact some worm eggs or larvae can be dormant in the dog's body and activated only in times of stress.
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