CEM Quarantine

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American Association of Equine Practitioners (AAEP) CEM Guidelines

The American Association of Equine Practitioners has released comprehensive guidelines that discuss the identification, diagnosis and control of Contagious Equine Metritis (CEM).

The Center for Equine Health at UC Davis serves as the U.S. Department of Agriculture's California Contagious Equine Metritis (CEM) Quarantine and Treatment Station. It is our honor to serve the equine industry with this important protection protocol. For decades, the CEM Quarantine and Treatment Station has been meeting the needs of horse owners and we are proud of our standing as a quarantine facility that has not released a positive animal throughout our history.

Conveniently located with easy access to Interstate 80, the UC Davis Center for Equine Health is the closest west coast quarantine facility to the Los Angeles entry port. Our specially-trained staff provide each horse with tailored personal attention in a calm and comfortable atmosphere. We make every effort to facilitate a smooth process for our clients and on-time release of quarantined horses.Quarantine Facilities

When you use our quarantine program, you are not only receiving disease control services, you are also getting access to the #1 ranked veterinary program in the world. Our partnership with the UC Davis School of Veterinary Medicine's equine veterinary hospital provides our clients with world-class veterinary services, knowledge, and experience to address any equine health need.


Since the CEM program is federally controlled, the care and culture procedures are performed by trained technicians and are not part of the teaching program at UC Davis. If a horse needs medical care outside of the CEM testing, a staff veterinarian from the world-class UC Davis veterinary hospital is called to evaluate the patient.

Quarantine Rate

quarantine facilityThe price of $9,690 per stallion includes board for the minimum of 33 days required for the CEM testing protocol to be conducted. To complete testing of each stallion, two local mares must be maintained and tests performed to establish their CEM-free status. Ovariectomized mares (mares that have had their ovaries removed) are used for test breeding so that they can be synchronized easily and no pregnancy can result. They are bred to the stallion, then cultured and a blood sample is taken to establish that no CEM bacteria have been transmitted from the stallion to the mare. This procedure is essential to validate a negative result.

The price of $3,390 per mare includes board for the minimum of 15 days required for the CEM testing protocol to be conducted.  If there is a foal accompanying the mare, there is an additional price of $740. Mares are tested and cultured periodically throughout their quarantine period.

Board beyond the days required is $71.00 per day.  Prior or necessary treatment with antibiotics or positive test results may prolong the required stay time.

A signed contract and the quarantine fees are required to secure your horse's reservation at our quarantine facility.  Payment may be made by check, credit card or wire transfer.  If additional charges are incurred during quarantine due to additional boarding time, horseshoeing, foaling fees, etc., the owner will be notified in advance and payment will be expected before the horse is released from the facility.

Please call for a reservation at least 2 to 3 weeks in advance of your horse's expected arrival.  To make a reservation or for more information, please contact the CEH office at (530) 752-6433 or e-mail cehadmin@ucdavis.edu.