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What You Should Know About Feline AIDS

By: PetPlace Staff

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Feline immunodeficiency virus, or FIV, is a widespread viral infection that attacks the immune system of cats. It is caused by the same family of viruses that triggers AIDS in humans and has much the same devastating impact on infected cats. It is often referred to as "feline AIDS."

The virus devastates a cat's immune system, stopping it from effectively combating other diseases and infections. Infected cats eventually fall prey to a wide variety of secondary illnesses that overwhelmingly prove fatal. There is no cure, but cats can live for up to 10 years – much of it in seeming good health – before succumbing.

It is estimated that between one percent and 14 percent of the cat population is infected with FIV. The disease is transmitted from cat to cat by blood and saliva. This happens primarily through biting and scratching so outdoor and male cats that fight with other cats are at greatest risk. FIV has also been found in milk and can be transmitted from mother to kitten. Transmission among household cats through normal contact is thought to be unlikely. Nor can the disease be transmitted to humans.

How FIV Progresses

FIV has three stages of infection:

  • Stage 1 – In the first stage the virus first causes infections, fever and swollen lymph nodes.

  • Stage 2 – During this stage, the virus is in effect dormant and many cats appear "healthy." This is called the sub-clinical phase and lasts from months to years.

  • Stage 3 – In the final, often referred to as "terminal" stage, the cat suffers the infections and diseases that are often fatal within a year. It is called the chronic infection stage.

    Diagnosis

    An infected cat will often suffer from numerous diseases and infections, including anemia, infections of the gums and mouth, cancer and skin disorders. The cat may also suffer neurological problems that cause seizures, problems maintaining balance and dementia, as well as behavioral changes like inappropriate elimination. Co-infection with feline leukemia virus can occur. Many cats may seem healthy but they are still infected.

    The key to diagnosing FIV is determining whether these problems are the result of a suppressed immune system caused by the virus. Your veterinarian will take a medical history, do a complete physical examination and administer an FIV blood test designed to see whether a cat has developed antibodies to the virus. If antibodies are present, it indicates the virus is present in the body. This test is called ELISA or IFA.

    It is a good idea to test kittens because they contract the virus when nursing, but it is also possible for a test to show wrongly that a kitten is infected; a nursing kitten can also carry the antibodies of an infected mother without being infected itself. A kitten that tests positive should be retested after six months of age, when it carries its own antibodies and test results will be more reliable.

    A cat that tests positive or appears to have FIV will likely undergo further tests to measure its general health and the impact the disease is having on individual organs.

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