Disease

Like their human counterparts, feline lungs are bag-shaped, elastic organs, two in number, located on either side of the heart and occupying most of the space in the chest cavity. They are virtually identical in structure to human lungs as well, functioning in the same manner and fulfilling the same fundamental purposes — removing carbon dioxide from the bloodstream and keeping the blood constantly supplied with life-sustaining oxygen. The lungs perform their vital functions by means of two processes — properventilation and perfusion — explains Richard Goldstein, DVM, an associate professor of small animal medicine at Cornell University’s College of Veterinary Medicine.

At first, the owner worried that her cat Misket had worms. Her 11-year-old pet had a ravenous appetite, yet she appeared to be losing weight and her coat looked dull and unkempt. The veterinarian took a blood test and came up with a surprising diagnosis to her owner: hyperthyroidism, or overproduction of thyroid hormones. Feline hyperthyroidism tends to occur in elderly cats; 95 percent of the cats that develop this disease are older than eight and the mean age of the victims is about 12 years, according to John F. Randolph, DVM, professor of medicine in the section of small animal medicine at Cornell’s College of Veterinary Medicine.

Feline infectious peritonitis (FIP) has long been a difficult diagnosis with little hope. But a new medication shows promise — and a cutting-edge genetic breakthrough may also be within reach. This progress was announced to 200 veterinarians, cat breeders and cat lovers at the 33rd annual Winn Foundation Symposium in Reston, VA.

Diabetes mellitus in cats is similar to the human disease. The cat cannot efficiently use the sugar (glucose) she takes in with her diet. This is because either she is not producing sufficient amounts of insulin — which regulates the body’s use of sugar — or the cat’s body cannot respond to insulin. One key to treating a diabetic cat is to stabilize her diet and feeding times to control her weight and the amount of glucose in her blood.

Humane considerations overwhelmingly support the practice of spaying — the surgical removal of a female cat’s ovaries and uterus — when an animal is about six months of age. Perhaps the most compelling argument in favor of this procedure (also known as ovariohysterectomy) is the reduction of feline overpopulation. One study has found that 85 percent of cats that are dropped off at shelters are eventually destroyed. It is estimated that as many as three to four million unwanted cats and kittens are put to sleep annually in the U.S.

Cytauxzoonosis — often a fatal infection in domestic cats — is a disease caused by the parasite Cytauxzoon felis, which is transmitted by the bite of a tick. Most affected cats are young adults with exposure to the outdoors and vague clinical signs of lethargy and anorexia. Treatment for cytauxzoonosis is usually imidocarb diproprionate, but a combination of atovaquone and azithromycin (A&A) has also been utilized as a treatment. (neither form of therapy has been prospectively evaluated for efficacy, however). Eighty acutely ill cats with Cytauxzoon felis infection were treated at various veterinary clinics. Of 53 cats treated with A&A, 32 (60 percent) survived to discharge.

While most cats will go through life without experiencing a serious problem with their ears, owners should know that a variety of conditions — including congenital defects, infections, trauma, and age-related changes — can be extremely painful and may compromise an animal’s hearing. Most feline ear disorders are readily treatable and will not result in permanent hearing loss, notes James Flanders, DVM, an associate professor of surgery at Cornell University’s College of Veterinary Medicine. However, some conditions may render a cat partially or totally deaf, especially if they remain unrecognized and untreated.

Feline dermatophytosis, commonly referred to as ringworm, is a fungal infection that is frequently observed in cats. The condition occurs worldwide, most commonly in warm, humid climates that are hospitable to the peculiar type of fungus that causes it. In the U.S., the disorder is especially problematic year-round in the deep South, says William Miller, VMD, a professor of dermatology at Cornell University’s College of Veterinary Medicine, and its prevalence can rise markedly in cooler areas of the nation with the arrival of hot and muggy summer weather. The clinical signs of ringworm include areas of hair loss, broken and stubbly hair, patches of scaling, crusty or inflamed skin and alterations in hair color.

A common single-celled organism called Toxoplasma gondii is a parasite that infects many animals, including rats — in which it causes a peculiar and unexpected transformation. We all know that the average rat will avoid cats at all costs, and they become particularly nervous when exposed to cat urine. That is, unless they’re infected with Toxoplasma.

A cat’s physical well-being depends largely on the efficiency of its endocrine system, an array of small organs that manufacture chemicals called hormones and deliver them into the animal’s bloodstream. Once they reach their respective target destinations, hormones interact with tissues to enable bodily processes and to ensure their effectiveness. Among the components of the endocrine system is the pancreas — a relatively tiny organ located near a cat’s stomach and small intestine. Perhaps the most important function of the pancreas is the manufacture of a hormone called insulin. After a cat has consumed fats, carbohydrates, and proteins, these dietary components are broken down into a vitally necessary chemical substance called glucose — sometimes referred to as “blood sugar.”

Every so often, your otherwise fastidious cat will do this alarming and somewhat disgusting thing. She’ll awake from a peaceful nap, rise up on her paws, retch convulsively for a moment or two, and spit up what may appear at first glance to be a damp clump. What the animal has disgorged — in the middle of your kitchen floor or, worse yet, in the middle of your prized Persian rug — is a trichobezoar, a wad of undigested hair that is commonly referred to as a hairball.Despite the term, disgorged hairballs are not always round. They are often slender and cylindrical, shaped more like a cigar or sausage than a ball.

Red and swollen gums, bad breath, declining appetite and weight loss are among the conspicuous indications that your cat is suffering from a disorder centered in its mouth, most likely in its teeth and gums. The animal may not appear to be in pain, but that’s because cats are generally very good at concealing illness, possibly because they don’t want to signal a potential predator that they are weakened and are thus vulnerable to attack. But a cat with dental disease is likely experiencing significant discomfort, since the sensory nerves that cause humans to experience dental pain are present in the cat as well. Feline dental problems are not at all uncommon, with approximately 90 percent of all cats experiencing some type of dental disease at one time or another.