Contagious equine metritis
Contagious equine metritis (CEM)
Contagious equine metritis is a non-systemic disease of the reproductive organs that is unique to equids and is caused by Taylorella equigenitalis, an immobile, gram-negative, microaerophilic rod. Taylorella are very fastidious and reproduce very slowly. Therefore, the cultures are incubated for at least 7 days, some countries require a longer incubation period in the context of import controls.
Infected stallions are asymptomatic carriers and show no symptoms. In mares, symptoms vary widely from clear clinical signs of vaginitis, cervicitis and endometritis with mucopurulent vaginal discharge to subclinical infections. Temporary infertility lasting several weeks develops regardless of the degree of other symptoms. The general condition is usually not affected. After recovery, mares may remain carriers of germs for months and act as a source of infection.
The detection method recommended by the OIE is direct pathogen detection by cultivation. Molecular biological methods (PCR) are also permitted for investigations within the scope of Directive 92/65/EEC. Sampling, transport Swab samples must be sent to the laboratory chilled in transport medium with activated charcoal. No more than 48 hours may elapse between sampling and examination. Unrefrigerated samples must be tested within 24 hours. Samples must not be collected until at least 7 days after parenteral antibiotic therapy and 21 days after local antibiotic therapy. Sampling mare
- Clitoral fossa
- Clitoral sinus
- Uterus or cervix
- Glandular fossa
- Penis shaft (envelope site)
- In the case of insemination stallions, a swab of pre-secretions or semen
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