Validation of an Easy Handling Sample Preparation and Triplex Real Time PCR for Rapid Detection of T. equigenitalis and Other Organisms Associated with Endometritis in Mares.
Abstract: Isolation and identification of Taylorella equigenitalis, the causative agent of contagious equine metritis, by bacteriology is laborious and does not permit differentiation from the other member of the genus, Taylorella asinigenitalis. Moreover, other organisms such as Klebsiella pneumoniae and Pseudomonas aeruginosa can also cause endometritis in mares and warrant diagnostic detection. Our objectives were to develop a rapid preparation method for field swab samples and to validate this protocol using new multiplex real-time polymerase chain reaction (rtPCR) detection tools for identification of these four pathogens. The complete analytical process from sample preparation to PCR analysis was then evaluated against bacteriology, the World Organisation for Health's (OIE) gold standard method for T. equigenitalis and commonly used for the other three pathogens. The diagnostic sensitivity and specificity of this method, which used direct lysis and a multiplex rtPCR, were 100% and >92%, respectively. This study provided a simple-to-use method for prebreeding screening of mares and stallions.
Copyright © 2020 Elsevier Inc. All rights reserved.
Publication Date: 2020-09-02 PubMed ID: 33077078DOI: 10.1016/j.jevs.2020.103241Google Scholar: Lookup
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- Journal Article
Summary
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The research article abstract discusses a new quick and efficient method to prepare field swab samples and identify the presence of certain bacteria-causing endometritis in mares using a multiplex real-time polymerase chain reaction (rtPCR). The tests were evaluated against the existing gold standard detection method set by the World Organisation for Health (OIE), resulting in a diagnostic sensitivity and specificity of 100% and >92% respectively.
Objectives and Purpose
- The primary objective was to create a rapid preparation method and protocol for field swab samples. The researchers aimed to facilitate on-the-spot processing and results, allowing for quicker responses.
- They also strived to develop a multiplex real-time polymerase chain reaction (rtPCR) detection tool that could identify four pathogens known to cause endometritis in mares. These pathogens include Taylorella equigenitalis, Taylorella asinigenitalis, Klebsiella pneumoniae, and Pseudomonas aeruginosa.
Methodology and Process
- The team devised a protocol that used direct lysis, a technique to rupture cells and release their contents—which, in the case of a bacterium, includes its DNA for analysis.
- They also utilized a multiplex rtPCR. This method amplifies selected DNA sequences for identification and allows for several DNA sequences to be amplified simultaneously, recognizing multiple pathogens in one test.
Validation and Comparison
- The newly developed method was validated against bacteriology, which is recognized by the World Organisation for Health (OIE) as the gold standard method for identifying T. equigenitalis and commonly used for detecting the other three pathogens.
- The researchers found that their new protocol displayed a diagnostic sensitivity and specificity of 100% and more than 92% respectively, indicating a high level of accuracy in identifying the presence of the pathogens.
Implications of the Study
- The adoption of this easy-to-use method can streamline the prebreeding screening of mares and stallions, enhancing the health and productivity of these animals by ensuring faster and more accurate diagnoses.
Cite This Article
APA
Léon A, Versmisse Y, Despois L, Castagnet S, Gracieux P, Blanchard B.
(2020).
Validation of an Easy Handling Sample Preparation and Triplex Real Time PCR for Rapid Detection of T. equigenitalis and Other Organisms Associated with Endometritis in Mares.
J Equine Vet Sci, 94, 103241.
https://doi.org/10.1016/j.jevs.2020.103241 Publication
Researcher Affiliations
- LABÉO Frank Duncombe, Caen, France; Normandie Univ, UNICAEN, U2RM, Caen, France. Electronic address: albertine.leon@laboratoire-labeo.fr.
- ADIAGENE, Ploufragan, France.
- LABÉO Frank Duncombe, Caen, France.
- LABÉO Frank Duncombe, Caen, France; Normandie Univ, UNICAEN, U2RM, Caen, France.
- ADIAGENE, Ploufragan, France.
- ADIAGENE, Ploufragan, France.
MeSH Terms
- Animals
- Endometritis / diagnosis
- Endometritis / veterinary
- Female
- Gram-Negative Bacterial Infections / diagnosis
- Gram-Negative Bacterial Infections / veterinary
- Horse Diseases / diagnosis
- Horses
- Real-Time Polymerase Chain Reaction / veterinary
- Taylorella
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