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Contagious equine metritis (CEM) affects horses, donkeys, mules, zebras and other equidae and is passed on through sexual contact. It does not affect humans.
Latest situation: last outbreak of CEM in Great Britain was in England in June 2021.
CEM is a venereal infection of the genital tract of horses triggered by the Taylorella equigenitalis bacteria.
Stallions do not normally show clinical signs of the disease, but can be carriers of it. Infected mares experience discharge from swollen genitals, especially one to six days after mating, and may also be temporary infertile.
If you suspect signs of any notifiable diseases, you must immediately notify your Scotland: field service local office at the
Animal and Plant Health Agency (APHA). Failure to do so is an offence.
How contagious equine metritis is spread
CEM is spread from horse to horse during mating, but it can also be spread when horses are artificially inseminated.
There is no vaccination available for CEM.
Human health implications
There are no human health implications becuase the disease is not zoonotic.
The Government's policy on disease control is that prevention is better than cure. This approach works by reducing the chances of a disease entering the animal population, and if it does then it can be quickly spotted and dealt with through the preventative measures.
Biosecurity is about being aware of the ways disease can spread, and taking every practical measure to minimise the risk of disease spreading.
If you suspect signs of any notifiable diseases, you must immediately notify your Scotland: field service local office at the Animal and Plant Health Agency (APHA). Failure to do so is an offence.