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How To Stop Pyometra In Cats From Becoming Life-Threatening

A Bacterial Infection That Affects The Uterus

By May 29, 2014 | See Comments

A Cat Laying On The Ground

Pyometra is a hormonal imbalance that causes a bacterial infection in a cat’s uterus. This condition is usually found in older cats who have not given birth to a litter of kittens. Pyometra is usually treated with surgery. Learn more here.

Pyometra is an infection of the female cat’s reproductive system, specifically in the uterus. Bacteria infects the uterus and can cause life-threatening symptoms.

In most diagnosed cases of pyometra, the cat’s owner can be a bit baffled as to how an infection occurred, especially if their cat has never had a litter of kittens, or never even mated. But that’s the thing about pyometra, it’s actually tied to the cat’s estrus cycles (similar to a woman’s menstrual cycle), particularly in older cats that have never been pregnant.

What causes pyometra in cats?

In short, hormonal imbalances in the uterus are the cause of pyometra in cats.

With every estrus cycle the cat’s progesterone hormone levels increase to prepare the uterus for pregnancy by stimulating growth of the uterine lining. If pregnancy does not occur, the uterine lining will continue to thicken with each cycle until cysts begin to form, a condition known as cystic endometrial hyperplasia.

It’s these cysts that secrete a fluid that allows bacteria to grow and ultimately become pyometra. The infection usually occurs two to eight weeks after the last cycle.

Veterinarians have also noted that white blood cells, which are responsible for fighting off infections, often have trouble entering the uterus during the estrus cycle. This is because white blood cells have the potential to damage sperm that may enter the uterus during this crucial reproductive time, so in response the cervix constricts.

Drugs containing both progesterone and estrogen, whether synthetic or natural, can also affect hormone levels in the uterus, in turn leading to pyometra.

What are the most common symptoms of pyometra in cats that I should be looking for?

Symptoms of pyometra will vary depending on whether or not the cat’s cervix has constricted and closed or remained open. It may also take a few days to a few months for symptoms to appear.

Open Cervix

Closed Cervix

What is the best treatment for pyometra in cats?

After the vet performs a physical examination, x-rays to determine if the uterus is enlarged, and runs a series of blood tests, they will be able to determine if your cat is suffering from pyometra. Surgery is the most common and effective treatment for pyometra in cats. As with a regular spaying procedure, the uterus and ovaries will be removed.

The earlier a cat is diagnosed and the surgery performed, the more successful the recovery will be. During recovery, the cat will need to take oral antibiotics for about two weeks.

If pyometra is not treated the infection can be fatal. The uterus can rupture, the kidneys can fail, internal organs can become damaged, and blood poisoning may occur. Medical treatment is always necessary for pyometra.

More on Cat Health

All About Spaying And Neutering Dogs And Cats
All About Cat Examinations - What To Expect At A Vet Visit
The Best Senior Cat Pet Supplies

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Pyometra at a glance

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  • 1Pyometra is a reproductive infection that occurs in female cats
  • 2Changes in hormone levels cause the uterine lining to thicken and for cysts to form
  • 3Two common symptoms of pyometra can be either vaginal discharge or a swollen abdomen
  • 4Pyometra is most often treated with surgery
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