Illustrated Articles

Infectious Diseases

  • Campylobacter infection or Campylobacterosis is a bacterial intestinal infection cased by Campylobacter jejuni and Campylobacter upsaliensis. It is a major cause of human bacterial enteritis although it is considered a normal bacterium in the intestinal tract of many animals and birds.

  • Candida albicans is a common environmental fungus that can affect the digestive tracts of birds. It is a common cause of “sour crop” or a crop infection (ingluvitis), especially in young birds.

  • Brucellosis is an infectious disease caused by bacteria from the genus Brucella. There are different species of Brucella that infect sheep, goats, cattle, deer, elk, pigs, dogs, and other animals.

  • Histoplasmosis is a chronic, non-contagious fungal infection caused by the soil-dwelling fungus Histoplasma capsulatum. Histoplasma capsulatum is found globally and may infect both humans and animals. However, histoplasmosis is uncommon to rare in all but dogs and cats.

  • Cheyletiellosis is an uncommon but highly contagious skin parasite of dogs, cats and rabbits caused by Cheyletiella spp. mites. It is also referred to as "walking dandruff" due to the appearance of the large, whitish mites as they crawl across skin and fur, and the excessive scaling that accompanies the infection.

  • Feline chlamydial conjunctivitis, or chlamydophila (previously known as feline pneumonitis) is an infection caused by a bacterial organism called Chlamydophila felis (previously known as Chlamydia psittaci [feline strain]). Although the term pneumonitis implies inflammation of the lungs, the most common symptoms of C. felis infection involve the eyes or the upper respiratory tract (nose or throat), and only when infection is not treated does it spread to the lungs.

  • Chlamydophilosis, also called "psittacosis", “chlamydiosis” or "Parrot Fever", is a reasonably common disease of birds. It can occur in any bird but is especially common in cockatiels, Amazon parrots and budgerigars (often referred to incorrectly as parakeets.)

  • The upper respiratory tract includes the nose, the throat (pharynx and larynx), and the trachea (windpipe). The term "chronic" means “long lasting.” When clinical signs of upper respiratory tract inflammation, such as sneezing or nasal and ocular (eye) discharge, persist over weeks or months, or when they tend to recur at intervals of a few weeks, this is referred to as Chronic Upper Respiratory Tract Disease.

  • Coccidiosis is an intestinal tract infection caused by a one-celled organism or protozoa called coccidia. Coccidia are microscopic parasites that live within cells of the intestinal lining.

  • Coccidiosis is an intestinal tract infection caused by one-celled organisms (protozoa) called coccidia. Coccidia are sub-classified into a number of genera, and each genus has a number of species. Coccidiosis typically refers to gastrointestinal infections with Isospora species of coccidia.