Educational Articles

Medical Conditions

  • Feline chlamydial conjunctivitis, or chlamydophila (previously known as feline pneumonitis) is an infection caused by a bacterial organism called Chlamydophila felis. Although the term pneumonitis implies inflammation of the lungs, the most common signs of 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.)

  • Cholangitis is a term referring to inflammation of the bile duct. Cholangiohepatitis means inflammation of the bile ducts, gall bladder, and surrounding liver tissue. Cholangitis and cholangiohepatitis usually occur together as a complex or syndrome (CCHC or CCHS) and is much more common in cats than in dogs.

  • Chronic degenerative valve disease (CVD) is a consequence of degeneration of the valves between the atrium and ventricle on both the right and left side of the heart. The changes in the valves stops them from forming a tight seal between the atrium and ventricle when the heart is squeezing or pumping. This causes the valves to leak blood backwards into the upper chambers, and an abnormal sound called a heart murmur.

  • Chronic egg laying occurs when a female bird lays more than the normal number of eggs or, more commonly, lays repeated clutches of eggs, especially in the absence of a mate. The persistent laying of eggs may lead to malnutrition induced by the chronic depletion of calcium from the body for the production of the egg shells.

  • The kidneys have many functions. They principally act to remove waste products from the blood stream, regulate the levels of certain essential minerals such potassium and sodium, conserve water, and produce urine. The kidneys have a large amount of spare capacity to perform their various functions so at least two-thirds (67% to 70%) of the kidneys must be dysfunctional before any clinical signs are seen.

  • The kidneys have many functions. They principally act to remove waste products from the blood stream, regulate the levels of certain essential minerals such potassium and sodium, conserve water and produce urine. The kidneys have a large amount of spare capacity to perform their various functions so at least two-thirds of the kidneys must be dysfunctional before any clinical signs are seen.

  • 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.

  • Chronic Obstructive Pulmonary Disease is a long-term inflammatory condition that affects the pulmonary or respiratory system. This condition is irreversible and is slowly progressive. This condition may also be known as "chronic bronchitis".

  • Chronic Obstructive Pulmonary Disease is a long-term inflammatory condition that affects the pulmonary or respiratory system. This condition is irreversible and is slowly progressive. This condition may also be known as "chronic bronchitis".