Contagious equine metritis,
United Kingdom
Information received on 06/04/2020 from Dr Christine Middlemiss, Chief Veterinary Officer, DEFRA, Department for Environment,Food and Rural Affairs , London, United Kingdom
Report type Immediate notification
Date of start of the event 01/04/2020
Date of confirmation of the event 03/04/2020
Report date 06/04/2020
Date submitted to OIE 06/04/2020
Date event resolved 06/07/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 11/09/2012
Manifestation of disease Sub-clinical infection
Causal agent Taylorella equigenitalis
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (06/04/2020)
Follow-up report No. 1 (15/07/2020)
New outbreaks (1)
Outbreak 1 (CEM 2020-1) Fife, Scotland
Date of start of the outbreak 01/04/2020
Outbreak status Resolved (06/07/2020)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 26 1 0 0 0
Affected population One stallion on premises in isolation. Ten pregnant mares and fifteen mares awaiting artificial insemination no contact with affected stallion.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 26 1 0 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Equidae 3.85% 0.00% 0.00% 0.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments Whilst carrying out a routine pre-breeding sampling, an imported 6 year old Warmblood stallion has been confirmed positive for Contagious Equine Metritis (CEM). It is now placed under restrictions on the stud whilst investigation and tracings continue.The Stallion and one identified contact mare on the same premises are undergoing treatment.
Control measures
Measures applied
  • Movement control inside the country
  • Traceability
  • Disinfection
  • Vaccination permitted (if a vaccine exists)
  • Treatment of affected animals (antibacterial wash and topical antibiotic cream)
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Liphook Equine Hospital (Local laboratory) Equidae bacteriological examination 01/04/2020 Positive
Liphook Equine Hospital (Local laboratory) Equidae polymerase chain reaction (PCR) 01/04/2020 Positive
APHA PENRITH (National laboratory) Equidae polymerase chain reaction (PCR) 03/04/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations