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Illustrated Articles

Infectious Diseases

  • Psittacine beak and feather disease (PBFD) is a serious condition in parrot species for which there is no cure. The highly contagious virus attacks fast-growing epithelial cells, commonly causing visibly abnormal formations of the beak and/or feather follicles. The clinical signs vary depending on the species of bird and the age at which it was infected. Diagnostic testing is available and precautions must be taken when purchasing a new bird.

  • Rabbit hemorrhagic disease virus (RHDV) is a fatal calicivirus that affects only rabbits. It can be transmitted by direct contact with a diseased rabbit or from feces, urine, or hair from a diseased or dead rabbit. There is no known treatment, but an American-made vaccine is available in the US. Europe has had a vaccine available for years.

  • Rabbit syphilis is a sexually transmitted disease caused by a spirochete organism called Treponema cuniculi. Infected rabbits will develop sores that are confined to the mucocutaneous junctions, such as the external genitals, anus, lips, nostrils, and eyelids. Treatment involves two to three weekly penicillin injections. Humans cannot contract this disease from rabbits.

  • 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.