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Zoonotic Diseases + English

  • 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.

  • 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.

  • H1N1 influenza virus emerged in pigs as a genetic sharing of DNA from both human and swine influenza viruses. It caused a deadly pandemic in 2009 and continues to be an important cause of illness today. Pets including cats and dogs can be infected from their owners and become ill. It is not yet known to transfer from pets to humans. Good hygiene and restricted exposure should be taken immediately if there is any sign of influenza-like infection to restrict spread between humans, and between humans and their pets or domestic animals.

  • 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.

  • There are several tests for diagnosing leptospirosis, but the two most common ones are the DNA-PCR test and the microscopic agglutination test (MAT). Infection can be diagnosed with either test, but each has weaknesses, and in some situations, both tests may be needed to reach a diagnosis.

  • Ticks are parasites that feed on the blood of their host and can in turn transmit diseases to your pets or even you. They are prolific breeders, and their life cycles can extend through multiple seasons. Prompt removal or use of preventatives limit or prevent the spread of disease or kill the ticks.

  • Tularemia is an infection of the bacteria Francisella tularensis and is most common in rabbits and rodents. Infection in dogs occurs from ingestion of an infected animal, drinking contaminated water, or getting bitten by a blood-sucking insect. Tularemia causes mild illness in healthy dogs. More severe clinical signs include enlarged lymph nodes and draining abscesses. Treatment includes antibiotics, surgical removal of any draining abscesses, and any other supportive care warranted by the dog's condition. Tularemia is a reportable zoonotic disease.

  • Veterinarians routinely recommend certain vaccines for all dogs (called core vaccines) while they recommend others more selectively, according to the dog’s environment and lifestyle. Vaccines work by stimulating the body's immune system to recognize and fight particular microorganisms such as a virus, bacteria, or other organism. The vaccine helps prevent infection or lessens the severity of infection and promotes rapid recovery.

  • The West Nile Virus (WNV) is transmitted by the bite of a mosquito (primarily Culex species) that is infected with the virus. Birds are both susceptible to the virus and can act as a host, though indigenous birds such as owls, hawks, eagles, crows, and jays appear to be most at risk in comparison to pet birds. There is no specific treatment once a bird is infected so prevention is of high importance.

  • Whipworms are intestinal parasites measuring about 1/4 inch (6 mm) in length. They live in the intestinal tract of cats where they can cause severe irritation. Whipworm infection results in watery diarrhea, weight loss, and general debilitation. Fecal testing will not detect every infection. Whipworm infection in cats is rare in North America but cases appear to be rising.