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Pyometra, Uterine Infection

Pyometra, Uterine Infection

Pyometra is a serious and potentially life threatening infection of the uterus. It occurs in some unspayed females, usually during middle age. It is common for pyometra to develop a few weeks after a heat cycle. Hormonal changes during and soon after a heat cycle can make the uterus more vulnerable to infection. The entire uterus may fill with pus.

Spayed females do not develop this form of the disease. Very rarely, a spayed female can develop an infection of the small amount of uterine tissue that can sometimes remain after a spay surgery (stump pyometra).

Signs and Treatment for Pyometra

  • loss of appetite
  • excessive thirst
  • vomiting
  • vulvar discharge or swelling of the vulva
  • abdominal discomfort

The disease can develop slowly over an extended period before the illness becomes apparent. Diagnosis is based on symptoms, examination findings, blood or other tests and x-rays. Treatment usually requires extensive therapy and surgical removal of the uterus.


  • Spayed females do not develop this form of the disease.
  • Use all medications as prescribed by your veterinarian.
  • It is important to follow any aftercare or post surgical instructions.
  • Monitor your pet's progress carefully and have her rechecked as directed by your veterinarian.

If you have questions about this or any medical topic, please contact your Banfield hospital today.