Internal Parasites Found In Dogs
Coccidiosis - is a parasitic disease of the intestinal tract of animals, caused by coccidian protozoa. The disease spreads from one animal to another by contact with infected feces, or ingestion of infected tissue.
Giardia - is also a single-celled parasite that, if swallowed, damages the lining of the intestine and reduces the absorption of nutrients from the food your pet eats. While most Giardia infections do not cause illness, severe infections can lead to diarrhea.
Heartworm - is a parasitic roundworm (Dirofilaria immitis) that is spread from host to host through the bites of mosquitoes. The heartworm affects dogs, cats, wolves, coyotes, foxes, and some other animals, such as ferrets, sea lions, and even humans. The parasitic worm is called a "heartworm" because the parasite, in the final reproductive stage of its life cycle, resides in the heart of its host where it can stay for many years and may kill its host through congestive failure of the heart.
Hookworms - that infect canines get their name from the hook-like mouth parts they use to attach to the intestinal walls of their hosts. Despite their small size, hookworms can siphon a large volume of blood from their hosts and cause serious illness, especially in young dogs.
Roundworms - These large worms live and feed in the small intestine of their host. Though all ages of dogs are susceptible to this parasite, puppies are generally hardest hit by infestations and may become seriously ill.
Tapeworms - The worms attach themselves to the inner walls of the intestine, but do not suck blood in the same volume as do hookworms. Though it is not among the most harmful of parasites, it is still important to minimize tapeworm infections in your companion animals, as they may be passed to other mammals and occasionally humans.
Whipworms - are small thread-like parasites that embed deep within the lining of the colon (large intestine) and cecum. Trichuris vulpis, the canine whipworm, is a common parasite and is a major cause of diarrhea in the dog.