Development and Application of a Multiplex Real-Time Polymerase Chain Reaction Assay for the Simultaneous Detection of Bacterial Aetiologic Agents Associated With Equine Venereal Diseases.

This research focuses on the development of a more sensitive and specific method for simultaneously detecting five common bacterial pathogens causing venereal diseases in horses. A multiplex real-time polymerase chain reaction was created and used in a surveillance program for equine venereal diseases in South Korea, which identified the presence of Taylorella equigenitalis and Klebsiella pneumoniae in 21% and 2% of the samples, respectively.

Objective of the Research

• The main aim of the research was to develop a novel diagnostic tool for effective and simultaneous detection of common bacterial pathogens causing venereal diseases in horses. The pathogens include Taylorella equigenitalis, Taylorella asinigenitalis, Pseudomonas aeruginosa, Klebsiella pneumoniae and Streptococcus zooepidemicus. The researchers sought to enhance the accuracy and efficiency of identifying affected horses, aiding in the implementation of proper management and treatment strategies.

Methodology

• The authors of the study developed two types of multiplex real-time polymerase chain reaction assays. This advanced molecular biology technique allows for the concurrent detection of different pathogens in a single test, providing higher sensitivity and specificity compared to traditional methods.
• The new assay was applied to swab samples collected from horses in South Korea in 2015, as part of a surveillance program for T. equigenitalis infection. This practical application of the assay aimed to validate its effectiveness in a real-world scenario.

Findings

• The study reported that 21% of the swab samples tested positive for T. equigenitalis and 2% were positive for K. pneumoniae. This means that these two bacteria were present in the sampled equine population, indicating a need for appropriate intervention measures.
• The samples did not contain any instances of T. asinigenitalis, P. aeruginosa, and S. zooepidemicus, suggesting that these pathogens may not be prevalent in the area, or that the sampled population might not be representative of the overall equine population in regards to these bacteria.

Impact of the Research

• The use of the developed assay in an existing surveillance program allowed for broader and more efficient screening of bacterial venereal diseases in horses in South Korea. This is significant as such diseases can cause substantial economic losses due to declining conception rates in breeding horses.
• This enhanced diagnostic capability can facilitate early detection, timely treatment, and better management of equine venereal diseases, ultimately benefitting the equine industry by potentially reducing disease-induced economic losses.