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Dogs + Parasites

  • Pythiosis is a waterborne infection that can infect the GI tract or skin of dogs. It can cause extreme weight loss, vomiting, diarrhea or skin lesions such as ulcerating nodules and draining tracts. This disease is more common in southern regions. Treatment involves surgical removal of all affected material if possible, including limb amputation if indicated. Different antifungal therapies have shown some efficacy and need to be continued long-term. Prognosis for resolution of pythiosis is guarded to poor.

  • Rocky Mountain Spotted Fever is a disease caused by an infectious organism with the scientific name of Rickettsia rickettsii. Rocky Mountain Spotted Fever occurs in North, South, and Central America.

  • Roundworms are the most common gastrointestinal worm found in dogs and can also be transmitted to people. They are of most concern to puppies when present in large numbers, causing stunted growth, a pot-bellied appearance, and recurrent diarrhea. Diagnostic testing, treatment, and preventive measures are explained in this handout.

  • Salmon poisoning is caused by a type of bacteria found within parasitic flatworms that infect the tissues of wild fish found in coastal streams of the Pacific Northwest.

  • Sarcoptic mange, also known as scabies, is caused by a parasitic mite that burrows just beneath the surface of the skin. The presence of the sarcoptic mite causes intense itching; an affected dog will constantly chew and scratch his skin. Sarcoptic mange is highly contagious to other dogs and humans.

  • Sarolaner is given by mouth and is used to treat flea and tick infestations and has also been used off-label to treat certain types of mange and mites. Give as directed. Side effects are uncommon but may include stomach upset or neurologic symptoms. Do not use in pets with a history of seizures. If a negative reaction occurs, please call the veterinary office.

  • Tapeworms are parasites that infect the gastrointestinal tract of dogs, other animals, and humans. Several types of tapeworms are known to infect pets, but the most common species observed in dogs is Dipylidium caninum, which is transmitted through fleas. Risk factors, clinical signs, treatment, and prevention are explained in this handout. Other, less common types of tapeworms that affect dogs and humans are also covered.

  • Heartworm disease is caused by a parasite called Dirofilaria immitis, better known as heartworm. Dogs become infected when they are bitten by an infected mosquito that is carrying immature heartworms. This handout discusses signs, diagnostic tests, treatment, and prevention in dogs.

  • Although ticks are commonly thought of as insects, they are actually arachnids similar to scorpions, spiders and mites. All ticks have four pairs of legs (eight legs in total) as adults and have no antennae.

  • Von Willebrand's disease causes an inability for blood to clot resulting in excessive bleeding. If this disease is suspected, initial screening tests include a complete blood count (CBC), buccal mucosal bleeding time, and a coagulation profile. More advanced diagnostics include assays that assess the quantity and functionality of vWF. DNA testing is available and most commonly used to evaluate animals used in breeding programs.