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  • Cyanosis is defined as a bluish discoloration of the skin and mucous membranes of the body, caused by inadequate oxygen levels. Treatment will depend upon the underlying reason for the low oxygen levels.

  • When there is not enough oxygen being carried to the body by the red blood cells, the skin and mucous membranes can turn a bluish color. This is known as cyanosis.

  • Cyclosporin is an immunosuppressive agent. It is used to treat diseases and disorders caused by an overactive immune system. An ointment for the eye is also available for treating dry eye syndrome (keratoconjunctivitis sicca). Cyclosporin may be used to help heal cracks around the anus (perianal fistulas).

  • Cyclosporine is a medication that targets the immune system and is used to treat atopic (allergic) dermatitis in dogs and cats. Cyclosporine is given by mouth, in the form of a capsule for dogs and a liquid suspension for cats.

  • Cyproheptadine is an antihistamine that may be used to prevent or control an allergic reaction. This medication may also be used to stimulate a cat’s appetite. Cyproheptadine is useful to relieve allergic symptoms; however, it will not cure the underlying disease. Your veterinarian may prescribe cyproheptadine for other symptoms or problems.

  • Cystitis is a general term referring to inflammation in the urinary bladder. The term cystitis does not imply a specific underlying cause. In cats, diseases of the lower urinary tract (bladder and urethra) are often grouped under the term feline lower urinary tract disease (FLUTD). The initial diagnosis of FLUTD is based on the identification of signs of lower urinary tract inflammation.

  • Cysts are hollow spaces within tissues that contain either a liquid or a solidified material; the contents may be a natural bodily secretion or an abnormal breakdown product.

  • Cytauxzoonosis is a tick-borne parasitic disease caused by Cytauxzoon felis, a protozoal organism. Cytauxzoon felis infects the blood cells of cats. It was first reported in the USA in 1976, and is now an important emerging disease in domestic cats.

  • Cytology is the microscopic examination of cells that have been collected from body tissues. By examining the appearance of these cells and looking for inflammation or infection, it is often possible to diagnose specific diseases or determine the nature of a pet's illness (see article 'Cytology - General' for an introduction to Cytology).

  • Cytology is the microscopic examination of cells that have been collected from the body. By examining the appearance of these cells, including their number, size, shape, color, internal characteristics, and how they fit together with their neighbors, it is often possible to make a diagnosis of a specific disease process.