Contagious equine metritis (CEM) is a venereal disease of horses caused by the bacteria Taylorella equigenitalis. It is spread during breeding or through. Importance. Contagious equine metritis (CEM) is a highly communicable venereal disease of horses, caused by the bacterium Taylorella. Information, factsheets, photos, resources, and vaccines for Contagious Equine Metritis.

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Infection patterns in pony mares challenged with the agent of contagious equine metritis An epidemic of venereal infection in thoroughbreds.

Fact Sheet – Contagious Equine Metritis

CEM is suspected when multiple mares that are bred by the same stallion experience short-term infertility and have vaginal discharge. The Contzgious Clinics of North America. Isolation of CEM organism. Infected mares are usually infertile during the acute illness. The disease was first reported inand has since been contgaious worldwide. The first indication of the carrier state is lack of pregnancy in the mares covered by the stallion.

Preliminary observations on X-factor growth requirement of the bacterium responsible for CEM. If positive, they only indicate that the mare has had the disease in the past, and do not indicate whether the mare is a carrier now. Open in a separate window. Laboratory testing is needed to confirm the diagnosis.

The disease has been reported in Europe, Australia and the United States. There is no human health risk associated with CEM.

Contagious equine metritis CEM is a type of metritis uterine inflammation in horses that is caused by a sexually transmitted infection. Sample contagous and laboratory methods for the diagnosis of contagious equine metritis are described.


Although most contagious equine metritis outbreaks involved Thoroughbreds, infection in other breeds has also occurred. Treatment of stallions is successful. While one course of treatment may be sufficient in a stallion, it may take several months before the CEM organism can be successfully treated in a mare. Successful transmission of CEM to the donkey. Sites of CEM infection. There are two states of infection: How is CEM treated?

Most mares with acute endometritis recover spontaneously. Please review our privacy policy.

The disease was first reported in on horse breeding farms in Englandwhen an unusually high proportion of mares were not becoming pregnant. These tests become positive 10 or more days after infection.

Contagious equine metritis – Wikipedia

Abstract Contagious equine metritis is a highly contagious genital infection of mares, spread venereally, and was first described in Inhibition of the CEM organism by the normal flora of the reproductive tract. Stallions do not usually show any clinical signs of infection. The entire treatment is repeated daily for five days. Responses of mares to rechallenge with the organism of contagious equine metritis Views Read Edit View history. Survival properties of the causal agent of contagious equine metritis Taylorella equigenitalis is susceptible to most antibiotics, although the carrier state in mares is difficult to eliminate.

Serological response in mares affected by contagious equine metritis Attempted transmission of contagious equine metritis to other domestic animal species. Contagious equine metritis in the USA. What is being done to protect Canadian horses from CEM? Infected stallions tend to be the major source of infection, as they can harbour the disease for years without showing any clinical signs.

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Contagious Equine Metritis

The causative organism of contagious equine metritis Samples are refrigerated and transported to an approved testing laboratory within 48 hours of collection. Canada’s emergency response strategy to an outbreak of CEM would be to: It is advisable to maintain strict hygiene when handling and breeding mares and stallions to prevent disease transmission. It is relatively easy to eliminate the carrier state in stallions using local disinfectant.

Agglutinins to the causative organism of contagious equine metritis in human serum. A taxonomic study of the genus Haemophilus, with the proposal of a new species.

Is CEM a risk to human health? All horses of breeding age that are imported into Canada, from countries where CEM is endemic, must be tested for the disease before entering Canada. Endometrial biopsy studies of mares with contagious equine metritis In mares, this includes the endometriumcervixclitoral fossa and sinuses.

In stallions, samples are taken from the skin folds of the prepuceurethral fossaurethraand the pre-ejaculatory fluid.