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  • Chronic hepatitis is a progressive inflammatory liver condition. Although there are many potential causes, often the underlying cause is not identified. Initially there may be no clinical signs but as liver scarring increases, signs can include decreased appetite, vomiting, diarrhea, abnormal bleeding and a bloated appearance. Diagnosis, treatment and prognosis are discussed.

  • Chronic kidney disease (once called chronic kidney failure) is mainly a problem in mature and senior cats (seven years and older). Unfortunately, once the kidneys are damaged, they have minimal ability to recover. However, with proper management, most CKD cases progress very slowly. This handout describes the clinical signs of the condition, along with causes, diagnosis, treatment, and nutritional management.

  • 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.

  • Chronic lymphocytic leukemia is a slowly progressing cancer of a type of white blood cell called a lymphocyte. It can develop at any age but is more typically detected in middle-aged to senior dogs. It also seems to be more prevalent in German Shepherds and Golden Retrievers. This disease is often asymptomatic and detected on routine lab screening. Further diagnostic procedures, as well as treatments and prognoses, are described in this handout.

  • Chronic obstructive pulmonary disease or chronic bronchitis is a slowly progressing inflammatory condition of the lower airways. It most often affects small or toy breeds from middle-aged and senior dogs. The most common sign is a chronic dry cough. Exercise intolerance, collapsing, wheezing, or noisy breathing may develop as the condition worsens. Airborne irritants/allergens, chronic respiratory infections, obesity and dental disease are implicated in triggering the disease. Diagnosis can be made by ruling out other causes of cough through a minimum diagnostic database, radiographs, bronchoscopy, and cytology and culture of lung material obtained through tracheal wash or bronchoalveolar lavage. Treatment aims to minimize inducing factors including weight loss and avoidance of environmental irritants, as well as employing medications such as corticosteroids and bronchodilators. If using long-term, these medications are most often given using metered dose inhalers to manage the disease successfully.

  • Chronic upper respiratory tract disease in cats results from inflammation of any part of the upper respiratory tract. Many conditions contribute to this. Treatment is based on the underlying cause.

  • Chylothorax is a life-threatening condition caused by chyle leaking out of the thoracic duct into the chest cavity, causing lung compression and the inability of the lungs to fill with air. This occurs more commonly in purebred cats. The causes, diagnostics, treatments, and prognosis are explained in this handout.

  • Cidofovir ophthalmic is a topical antiviral medication used to treat viral eye infections, such as feline herpesvirus-1, in cats. This medication must be compounded by a veterinarian or veterinary pharmacy before use in cats. Side effects may include a mild stinging sensation or redness of the eyes. Pregnant women should not handle this medication.

  • Cimetidine is given by mouth and is used off label in cats, dogs, small mammals and horses to treat various gastrointestinal conditions related to acid production, such as ulcers and reflux. Side effects are uncommon and have not been documented in animals. Do not use in pets that are allergic to it or other histamine2 blockers.

  • Ciprofloxacin ophthalmic (brand name Ciloxan(R)) is an antibacterial agent used in the treatment of eye infections in dogs and cats. Its use in dogs and cats is off label or extra label. This medication should not be used in dogs that are allergic to quinolones. Some medications may interact with ciprofloxacin, so it is important to tell your veterinarian about any medications that your pet is taking. If a negative reaction occurs, please call your veterinary office.