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208 Breeds, 422 Health Conditions  |  Find a Vet

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Infected Uterus (Acute Metritis)




Condition Overview

Acute metritis is a bacterial infection that spreads upward into the uterus during the birthing process or shortly after.


Signs of metritis appear 2 - 7 days after whelping. A dam with acute metritis is lethargic, refuses to eat, has a fever of 103 - 105 degrees (F), is not attentive to her puppies, and may vomit and have diarrhea. There is a foul-smelling vaginal discharge, which should be distinguished from the normal greenish or bloody discharge common for the first few days.

A normal discharge is not accompanied by high fever, excessive thirst, and other signs of toxicity, such as vomiting and diarrhea.

Be sure to take the dam's rectal temperature daily after whelping and notify your veterinarian if she develops a fever or any of the signs just described. Acute metritis is a life-threatening illness that can rapidly progress to toxemia and shock.


Some cases are caused by a retained placenta or a mummified fetus. Others are caused by contamination of the birth canal during or after delivery. Unsanitary whelping quarters and failure to dispose of the placentas and change the bedding immediately after whelping predispose the dog to bacterial infection.


Abdominal palpation and ultrasonography help determine whether there has been a retained fetus or placenta. Cultures are taken to determine the pathogens involved and their antibiotic sensitivities.


Treatment involves administering intravenous fluids and antibiotics to support circulation and treat toxemia. Oxytocin or prostaglandin PGF2 (Lutalyse) is given to empty the uterus. Your veterinarian may insert a small catheter through the cervix and flush the uterus with sterile saline or betadine solution. A severely ill dam may require life-saving surgery to remove the uterus and ovaries.

Most dams with acute metritis are too ill to nurse puppies. The puppies should be taken off the mother and raised by hand. Dams that recover from acute metritis may develop a persistent low-grade infection of the lining of the uterus. See Endometritis.


Many cases of acute metritis can be prevented by a post partum checkup 24 hours after delivery. The veterinarian will give the dam an injection of oxytocin to clear the uterus if needed.


Please contact your veterinarian with questions regarding this condition.

Show Sources & Contributors +


Dog Owners Home Veterinary Handbook

Publisher: Wiley Publishing, 2007

Website: http://www.wiley.com/WileyCDA/

Authors: Debra M. Eldredge, Liisa D. Carlson, Delbert G. Carlson, James M. Giffen MD

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