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Dogs + Zoonotic Diseases

  • Rabies is one of the most devastating viral diseases affecting mammals, including dogs and humans. It is a fatal disease caused by infection with the rabies virus. Following a bite from a rabid animal, the disease progresses in stages. Vaccination is the cornerstone of rabies prevention.

  • Ringworm infections in cats are caused by a fungus, not a worm. They can be easily recognized, though definitive testing by fungal culture is recommended. Ringworm is highly contagious and can be spread between animals and from animals to people. The clinical signs, diagnosis, treatment, and risks 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.

  • 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 limitations, 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.

  • A zoonosis is a disease or infection that can be transmitted from animals to humans. Although dogs only pose a mild risk of causing disease in humans, those with immunosuppressive conditions such as HIV or those receiving chemotherapy will be at higher risk of becoming ill from these infections. The most common and significant infections that humans can get from their pet dogs include rabies, leptospirosis, ringworm, and gastrointestinal illness such as Salmonella and Campylobacter. Hygiene plays an important role in preventing the spread of these diseases, as well as preventive medicine for your dog, including regular deworming and external parasite preventives.