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Illustrated Articles

Infectious Diseases

  • Abnormal droppings are a non-specific sign of illness in birds. Causes may range from a dietary intake of excess fruits to bacterial or viral intestinal infections and heavy metal toxicity. Any changes in the color or consistency of your bird's droppings should be addressed by your avian veterinarian.

  • Aspergillosis is a severe and sometimes life-threatening fungal infection that commonly causes respiratory disease in pet birds. Infected birds may show respiratory signs, including tail bobbing, difficulty breathing, and coughing. Several diagnostic tests are available, but surgical laparoscopy is the most accurate. Aspergillosis is a very challenging disease to treat and even more difficult to cure. In many cases, referral to an avian specialist is advised.

  • If they are well looked after, including proper diet and husbandry, bearded dragons are reasonably hardy animals. Common health conditions of pet bearded dragons include CANV, atadenovirus, metabolic bone disease, parasites, infectious stomatitis (mouth rot), and respiratory infections. Any change from normal is cause for concern and should be immediately evaluated by your veterinarian.

  • Candida is a type of yeast that may cause problems in the digestive tract of birds. In young birds, immunocompromised birds, or birds that have been on antibiotics for an extended period, candida may overgrow in the digestive tract and cause various problems, such as 'sour crop'.

  • 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 infrequent. Dogs and cats seldom show severe clinical illness if infected with COVID-19.

  • Cataract formation is a reasonably well-known occurrence in pet birds. Canaries are more prone to cataract formation than other species of birds. Cataracts may be inherited or be secondary to a traumatic injury or infection involving one or both eyes.

  • 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.

  • Chlamydiosis (psittacosis, parrot fever, ornithosis) is a common disease of birds caused by a bacterial organism called Chlamydia psittaci. Birds with chlamydiosis exhibit a decreased appetite, weight loss, lethargy, diarrhea, nasal or ocular discharge, a fluffed-up appearance, and breathing difficulties. Testing and treatment are discussed. Chlamydiosis is a zoonotic disease, meaning that it can be passed to humans, so all new pet birds should be tested for this disease.

  • There a several viral diseases that affect pet and backyard chickens. Knowing the symptoms, treatment options, and methods of prevention is beneficial to anyone who owns chickens. The five most common viral diseases are: Marek's disease virus, lymphoid leukosis virus, avian influenza, infectious bronchitis and Newcastle disease virus.

  • COVID-19 is a disease caused by the coronavirus SARS-CoV-2. Current evidence suggests that person-to-person spread is the main source of infection. While there is evidence of transmission from humans to dogs and cats, it does not appear common. If you suspect that you are ill with COVID-19, you should take the same precautions with your pet as you would with people.