Prevalence of Taylorella equigenitalis infection in stallions in Slovenia: bacteriology compared with PCR examination.
Authors: Zdovc I, Ocepek M, Gruntar I, Pate M, Klobucar I, Krt B
Journal: Equine veterinary journal
Summary
# Editorial Summary: Taylorella equigenitalis Detection in Slovenian Stallions Contagious equine metritis (CEM), caused by *Taylorella equigenitalis*, poses significant breeding risks, yet prevalence data and diagnostic protocols remain inconsistent across European populations. Zdovc and colleagues examined 980 genital swabs from 245 stallions using both traditional bacterial culture and PCR to evaluate detection rates and diagnostic reliability. Among the cohort, 91.8% tested negative by both methods, whilst 6.9% yielded positive cultures at initial or repeat sampling; critically, three additional stallions (1.2%) proved PCR-positive despite failed bacterial isolation, indicating PCR's superior sensitivity. The higher detection rate with PCR—particularly valuable where contaminating microflora obscures culture results—suggests this molecular approach offers greater reliability for identifying carriers that standard bacteriology might miss. For breeding programmes and export certification, adopting PCR-based protocols could substantially improve the accuracy of CEM screening and reduce the risk of disease transmission through undetected positive stallions.
Read the full abstract on PubMed
Practical Takeaways
- •PCR should be considered the preferred diagnostic method for T. equigenitalis screening in stallions, as it detects infections that culture methods miss, especially when contamination is present
- •Slovenian stallion population shows relatively low T. equigenitalis prevalence (approximately 6.9%), but screening remains important given the contagious nature of equine metritis
- •Multiple sampling (first and second collection) may be necessary for reliable detection, and laboratories should employ PCR-based protocols for optimal sensitivity in routine screening programs
Key Findings
- •91.8% of 245 Slovenian stallions (225) were negative for T. equigenitalis by both culture and PCR methods
- •6.9% of stallions (17) tested positive by culture at first and/or second sampling
- •13% of stallions (3) were PCR positive but culture negative, indicating PCR detected infections missed by bacteriology
- •PCR demonstrated higher detection rate than traditional culture methods, particularly in samples with heavy bacterial/fungal contamination