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Contagious Equine Metritis (CEM)
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Key Points
  • Contagious equine metritis (CEM) is a venereal bacterial disease of equids caused by Taylorella equigenitalis
  • While many infections are subclinical, mares can present with mild vulval discharge and failure to conceive / early return to oestrus
  • Stallions are asymptomatic carriers and don’t develop clinical disease
  • Culture and/or PCR requires multiple samples from different genital sites to minimise the chance of false negatives
  • Treatment focuses on topical disinfection and antibiotics around the genitals
  • Screening and strict biosecurity are essential for disease prevention
Differential Diagnoses
  1. Bacterial endometritis
  2. Pyometra
  3. Endometrosis
Overview
Aetiology
Clinical Signs
Diagnosis
Treatment
Prevention
Resources
Overview

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Aetiology

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Clinical Signs

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Diagnosis

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Treatment

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Prevention

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Resources

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Educational content only. This factsheet is for general veterinary education and is not a substitute for professional veterinary advice, diagnosis, or treatment. Not for use in an emergency — contact a veterinarian or emergency service. Full disclaimer →