Health

During the past half-century, no fewer than 10 vaccines have been developed that, according to their manufacturers, can protect your cat against a wide variety of lethal feline diseases. In general, these claims of efficacy have been justified. According to Fred Scott, DVM, PhD, professor emeritus of virology at Cornell Universitys College of Veterinary Medicine and the founding director of the Cornell Feline Health Center, the vaccines have been responsible for "a tremendous improvement in feline health." He cites as a prime example the vaccine created to protect against the feline panleukopenia virus (FPV). "Prior to the late 1960s and early 1970s," says Dr. Scott, "half of all cats that passed through a shelter developed panleukopenia within a few days - and as many as 90 percent of them died from it. Today, the FPV vaccine has totally controlled the disease in properly vaccinated cats. The only time you see it now is in unvaccinated feral or farm cats or those that are in shelters, but that is rare." However, he points out, there are several reasons why owners should refrain from having their cats inoculated annually with every available vaccine. For example, it is remotely possible for a vaccine to damage a developing fetus or stimulate an allergic reaction. And of growing concern is the development of vaccine-associated sarcoma - a type of cancer that, for unknown reasons, emerges at the site on a cats body where a vaccine has been injected. Furthermore, research has brought into question the need for all cats to be routinely revaccinated with all available vaccines every year throughout their lives. Certain laboratory tests may reveal that, as the result of a previous vaccination or natural exposure to an infectious agent, the antibody levels in a cats blood remain high enough to protect it against a specific virus or bacterium. In that case, the animal would be protected against disease associated with that infectious agent and a booster shot would be unnecessary.

My cat, Nickel, meowed at the door to be let in this afternoon, as she always does after her outdoor adventures. Today was different, though, because when I went to the door to let her in she was sitting next to a dead crow. I dont know if she killed the crow, or if she found it dead and brought it for me to admire. Regardless, my first thought was of West Nile Virus. Can you tell me if cats can catch West Nile Virus from crows (dead or alive)? If they can catch the virus, are they able to pass it to humans?

More than 80 million cats currently live in American homes, and veterinary epidemiologists estimate that 800,000 or more of these animals - one percent or so of the nations domestic feline population - suffer from acute or chronic asthma. Although this condition - the most commonly diagnosed respiratory disorder in cats - is incurable, veterinary researchers are making progress in understanding its causes and devising methods for its effective treatment. Richard Goldstein, DVM, associate professor of small animal medicine at Cornell Universitys College of Veterinary Medicine, describes asthma as a constriction of the airways, or bronchi, the two narrow tubes that lead directly from the trachea to the lungs. The narrowing of the airways occurs when a cats immune system overreacts to the presence of an allergen and responds by releasing stimulants that cause inflammation and swelling of the sensitive tissue lining the bronchi and contraction of the surrounding muscle. This results in the narrowing of the airway and causes breathing difficulty (dyspnea), especially when exhaling. While specific asthma-causing agents typically remain unidentified, suspected allergens include tobacco smoke, dusty kitty litter; vapors from household cleaning solutions and aerosol sprays; pollen from trees, weeds and grass; mold and mildew; dust mites; smoke from fireplaces and candles; and even some foods.

For many pet owners, the realization that a cat will require medicating - even for just a few days - is enough to cause serious apprehension. Though some felines are extraordinarily good when it comes taking their medicine, others are not. Cats can be notoriously difficult to capture, restrain and medicate; however, with the following expert tips, medicating a cat can be much less stressful - for both cat and owner. "One of the biggest stumbling blocks for cat owners is the mindset with which they approach medicating their cats," explains Jodi Korich, DVM, the director of Partners in Animal Health at Cornell Universitys College of Veterinary Medicine. If you are nervous about medicating your cat or perhaps youre feeling incredibly worried because your kitty is ill, your cat will pick up on this. "You have to approach medicating your cat with the mindset that you are doing this for the cats own good, working calmly, quickly and not obsessing over the process," recommends Dr. Korich. A positive, confident approach may make your cat feel more secure.

Cats are known to be fastidiously discriminating in their eating behavior. Compared to dogs, they are extremely cautious about what they take into their mouths. Owing to their finicky habits, a cat is unlikely to ingest anything that could cause it to choke. But accidents do happen. A cats environment is full of countless little objects, from sticks, stones and rodent bones - to thimbles, buttons, rubber bands and strands of yarn. If a cat inadvertently takes such a foreign object into its mouth, is not immediately able to disgorge it and attempts to swallow it, the animals upper respiratory apparatus can become blocked and its oxygen supply can become seriously diminished or totally impeded. Oxygen deprivation can cause death within a matter of minutes. Therefore, any signs of choking must be viewed as an emergency situation requiring immediate attention. However, says Gretchen Schoeffler, DVM, chief of emergency and critical care services at the Cornell University Hospital for Animals, veterinarians rarely treat cases of feline choking. This is because such traumatic events tend to be either (1) self-limiting; (2) relieved thanks to prompt action by an affected animals owner; or (3) fatal before veterinary help can be obtained.

A study in the Journal of the American Veterinary Medical Association (Vol. 234, No. 2) found that some dietary supplements don’t dissolve fast enough to be absorbed by cats and dogs. The report was titled "Composition, disintegrative properties, and labeling compliance of commercially available taurine and carnitine dietary products" and said that two out of three (labeling and composition) were adequate. Researchers concluded: "Taurine and carnitine products evaluated in this study closely adhered to manufacturer claims and labeling guidelines. However, disintegration testing suggested high variability in some products, possibly limiting uptake and use by animals that receive them."

The principal function of feline blood, like that of human blood, is to transport oxygen and nutrients throughout a cats body tissues and to carry carbon dioxide and various waste materials away from them. But this is by no means the only vitally necessary role that this rich, red fluid plays. Typically accounting for five percent or so of a cats total body weight, the blood is a key contributor to many other processes, such as cell development, tissue repair and the warding off of infection. The components of a cats blood are virtually identical to those of human blood, notes Marjory Brooks, DVM, associate director of the Comparative Coagulation Laboratory at Cornell Universitys College of Veterinary Medicine. These components include red cells (erythrocytes), which are critical for oxygen delivery and also assist in the removal of toxic carbon dioxide; white cells (leukocytes), which help protect an animal against infection and parasitic disease; platelets, which promote clotting and wound healing; and a colorless fluid (plasma) in which these and other life-supporting blood components - such as hormones, proteins and salts - are suspended. Disorders directly associated with blood abnormalities may not be as easily recognized by owners as other feline diseases. That does not mean that they are necessarily less serious. On the contrary, says Dr. Brooks, the diagnosis of various feline blood disorders - including low platelet counts, low red cell counts, high white cell counts, clotting problems, blood-related cancers and even blood poisonings - are a common occurrence at the Cornell University Hospital for Animals (CUHA). And the diagnosis of one of these disorders - feline anemia - is apt to occur "weekly, at least," she says.

Whether happily playing with its favorite toy, vigorously pursuing a tiny mouse, or frantically fleeing from a mean-spirited predator, all of your cats activities rely on the controlled transmission of electrical signals among the billions of nerve cells (neurons) that are jammed into its little brain. In a normal cat, the transmission - or firing - of these signals is well controlled within the central nervous system. These neurons either fire or are inhibited from firing according to an animals shifting needs and desires. In the brains of cats affected with the disorder known as epilepsy, however, this elegant process goes awry. As Alexander de Lahunta, James Law Professor Emeritus of Anatomy at the Cornell Universitys College of Veterinary Medicine, explains: "Neurons are made to fire, so until the transmission of electrical signals is needed, they are kept in a static, inhibited state. If something interferes with that inhibition, an uncontrolled firing of neurons can occur - and that is the phenomenon commonly referred to as a seizure." Dr. de Lahunta describes the "classic" seizure as follows: "The animal suddenly begins to alter its behavior. It acts warily, as if it senses that something unusual is about to happen. It gets very tense, its muscles contract, causing stiffness and trembling. It begins to chew and to drip saliva, even though there is nothing in its mouth. Then the animal becomes increasingly rigid, falls to one side with its limbs extended, and starts paddling them. "Meanwhile, the cats entire body starts shaking - and at this stage, it may stop breathing for as long as 30 or 40 seconds. And then, the panting and shaking and everything else begins to slow down - and within a few minutes, the animal seems to be normal again."

When a cat begins soiling the house, it is usually assumed that it is a behavioral problem or the onset of senility. However, there are several medical conditions that can cause urinary incontinence and inappropriate urination, some of which require immediate treatment. First, it is important to distinguish between incontinence and inappropriate urination. True incontinence occurs when a cat does not have voluntary control over urination; trauma, a weak primary sphincter muscle and congenital abnormalities are the most common causes of incontinence. Inappropriate urination is much more common than true incontinence; this may be a behavioral problem or it may be the result of an underlying medical condition. The most common medical cause of inappropriate urination is inflammation of the urinary bladder. While the root causes often vary significantly, the signs - called lower urinary tract signs or LUTS - are similar: frequent urination, excessive licking of the genital area and difficult or painful urination. The actual diagnosis can range from a urinary tract infection to urethral blockage. It is extremely important to seek veterinary care if your cat exhibits these signs - do not assume that the animal is simply constipated. If he is suffering from urethral blockage, he may lose consciousness and die within a day or two of complete blockage. On the other hand, it may turn out to be something as treatable as a urinary tract infection. To begin with, your veterinarian may ask several questions...

Feline obesity is a problem among housecats. "As many as 30 to 40 percent of cats are overweight, with 15 to 20 percent falling in the obese range," says Joseph Wakshlag, DVM, PhD, DACVN, assistant professor of clinical nutrition at Cornell Universitys College of Veterinary Medicine. Despite public education efforts by the veterinary community, the numbers have not improved over the past decade, which is especially troubling because added weight can have serious health repercussions for cats. An overweight cat is at risk for several diseases, relates Dr. Wakshlag. "Obesity is one of the biggest factors for feline diabetes II," he says, adding that the extra weight carried by heavy cats causes stress on the felines joints, which can cause early onset of arthritis. Obese cats are also at heightened risk for feline hepatic lipidosis (FHL), or feline fatty liver syndrome, a liver disease that occurs when fat cells build up in the liver and prevent it from functioning normally. Heavy cats also may have more difficulties grooming themselves, which could cause hygiene and skin issues. Overweight cats may also be at increased risks in surgery.

When your purebred kitten reaches maturity, you may want to breed her, and you may already have a carefully worked-out strategy for doing so. Otherwise, there is no good reason to avoid having the little animal spayed while shes still in the early months of her life - and there are a number of good reasons for doing so. First and foremost among these reasons, says Andrea Looney, DVM, a lecturer in anesthesiology at the Cornell University Hospital for Animals, is that spaying - also called ovariohysterectomy - will help curb rampant feline overpopulation. According to the American Society for the Prevention of Cruelty to Animals, millions of feral and unwanted domestic cats are born each year. They are either abandoned or relegated to frequently overcrowded shelters and a dismal existence that is often relieved only by euthanasia. Moreover, Dr. Looney points out, spaying a female kitten at four to six months of age - when her reproductive organs are nearing maturity - will dramatically reduce her susceptibility to several life-threatening disorders associated with the feline reproductive system. For example, spaying a kitten prior to her first heat - before her breast tissue develops - will virtually eliminate her risk for mammary cancer later in life. Also, since spaying entails the removal of a females uterus, Dr. Looney notes, the procedure rules out the possibility of pyometra, a potentially fatal collection of pus in that reproductive organ. Other conditions that are prevented include vaginal hyperplasia, a gross swelling of the vaginal wall that occurs during the normal heat cycle; uterine torsion, a twisting of the uterus that may occur late in pregnancy; uterine prolapse, the bulging of the uterus into the vagina; and a variety of infections, cysts and cancers of the uterus and ovaries.

Here at ShortTakes office, we are on a healthcare honeymoon with Frannie, the feline "office manager" who is barely three years old. We are saving our worries (and money) for feline old age (the last ShortTakes muse, Gertie, lived to 21) when maladies like feline lower urinary tract disease (FLUTD) are likely to strike. Just in time to start to worry comes this report in Veterinary Clinics of North America (Vol. 39 Issue 1): "Changing Paradigms of Idiopathic Feline Cystitis." Cystitis is inflammation of the urinary bladder. Idiopathic means its cause is currently unknown. However, the stressors for cystitis have been identified. The report mentions "stressful events such as earthquakes, seasonal weather changes, moves to a new home, major holidays and diet changes." That settles it, Frannie. You cant move to California during the Santa Anna winds. Or Easter-Passover holidays, either.