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Infectious Diseases

  • Capillaria is a small internal parasite, often less than half of a centimeter in length. They are closely related to intestinal worms, though they can live in a variety of locations within the body. Diagnosis can be difficult because the eggs of Capillaria are shed only on an intermittent basis. While the parasite is easily eliminated with a dewormer, your dog may require additional medications to decrease the inflammation associated with the infection.

  • COVID-19 is a viral respiratory disease of humans that was first discovered in late 2019. The illness is caused by the virus SARS-CoV-2, which is a new coronavirus that has not previously been identified in humans. Certain animals can be infected by the COVID-19 virus, but it appears to be an infrequent occurrence. If you contract COVID-19, you will need to remain quarantined on your property which may make caring for dogs a bit more challenging. If you suspect that you may have COVID-19 (with or without a positive test result), you should minimize contact with your pets. Just as you would quarantine yourself from the other human members of your home while sick, you should also quarantine yourself from your pets. If you are hospitalized and your pets must be cared for by a boarding kennel or pet sitter, inform the kennel or pet sitter that you are ill, allowing them to take the necessary precautions.

  • Cat bites are puncture wounds that can cause bacterial infections with Pasteurella multocida that can spread within the tissues or into the blood stream. Any bite should be cleaned immediately and assessed by a physician as soon as possible, as antibiotics are frequently needed to treat infection. Your doctor may recommend vaccination with tetanus or rabies prophylaxis. Your doctor will report any bite to the local health department and your cat will have to undergo a quarantine – the length of which depends on their rabies vaccination status.

  • Cat scratch disease (CSD) is caused by the bacteria, Bartonella that is transmitted by cat fleas and other biting insects. Cats act as reservoirs for the bacteria. Humans are exposed to the bacteria through flea feces contaminating skin lesions or their eyes. Signs include fever, lethargy, enlarged lymph nodes, and lesions on the conjunctiva and skin. The disease is usually self-limiting; however, some people will require antibiotics especially if they are immunocompromised. Tests are available for diagnosis in humans as well as in cats. Strict flea control, good hygiene, keeping your cat indoors, and keeping your cat’s nails trimmed are among the most important ways to try to prevent CSD.

  • The normal lens in the eye of any animal is clear and colorless. A cataract is an increase in the density or opacity of the lens; it is often observed as whiteness within the pupil. Cataracts are often seen in canaries and less often in Amazon Parrots, African Grey Parrots, and Macaws. Cataracts decrease the visual acuity of the bird and may eventually lead to blindness.

  • Cefpodoxime is a third-generation cephalosporin antibiotic used to treat skin infections in dogs. It is also used off-label in cats and to treat other types of infection. It is given orally in tablet or liquid form. Side effects are uncommon. If a negative reaction occurs, contact your veterinarian.

  • This handout summarizes Chagas disease in dogs. Caused by a protozoal parasite called Trypanosoma cruzi, it is spread by the bite of infected insects or ingestion of infected insects and rodents. The clinical signs of the condition, along with its treatment, prevention, and risk to human health are outlined.

  • Cheyletiellosis in rabbits is a condition caused by the common rabbit mite, Cheyletiella parasitovorax. This mite’s effects are sometimes called "walking dandruff" because they are large, whitish mites that crawl across the skin and hair of a rabbit and cause excessive flaky skin. Other clinical signs of cheyletiellosis include itching, scratching, and hair/fur loss. This species of mites can live in the environment for a short time and affect people and other animals, so it is important to follow your veterinarian's recommendations for treating the environment and all pets in the household.

  • Cheyletiellosis is an uncommon but highly contagious skin parasite of dogs, cats, humans, and rabbits caused by Cheyletiella spp. mites. The most important clinical sign of cheyletiellosis is scaling or dandruff. Due to the large size of the skin mite, it is easily seen under a microscope set on low magnification. Cheyletiella mites are susceptible to most topical insecticides and the prognosis is excellent.

  • Chlamydial conjunctivitis in cats is highly contagious and can look similar to herpes conjunctivitis. Young cats and kittens are especially vulnerable to this infection, although chlamydia can be detected in cats of all ages. It is one of the most common causes of infectious conjunctivitis in cats. This handout describes the clinical signs and how this condition can be treated or prevented.