Simultaneous identification of 6 pathogens causing porcine reproductive failure by using multiplex ligation-dependent...

Area of Science:

• Veterinary Virology
• Molecular Diagnostics
• Swine Health

Background:

• Porcine reproductive failure is a significant economic concern in the swine industry.
• Accurate and rapid detection of causative viral agents is crucial for disease management.
• Existing diagnostic methods may have limitations in terms of speed or multiplexing capabilities.

Purpose of the Study:

• To develop and validate a multiplex ligation-dependent probe amplification (MLPA) assay.
• To enable simultaneous detection of six major viral pathogens associated with porcine reproductive failure.
• To compare the performance of the MLPA assay against real-time PCR.

Main Methods:

• Development of a multiplex ligation-dependent probe amplification (MLPA) assay.
• Targeting six viral pathogens: PRRSV, JEV, CSFV, PCV2, PRV, and PPV.
• Evaluation using 346 porcine umbilical cord blood specimens and comparison with real-time PCR.

Main Results:

• The MLPA assay achieved limits of detection ranging from 1 to 8 copies per reaction.
• High specificity (99.2-100%) and sensitivity (100%) were observed for most target viruses.
• The assay showed comparable clinical sensitivity to real-time PCR, with no JEV detected.

Conclusions:

• The developed MLPA assay is a reliable tool for the simultaneous detection of multiple swine viruses.
• It offers a fast and sensitive method for screening porcine reproductive failure-associated pathogens.
• This assay can aid in timely diagnosis and effective management of reproductive diseases in pigs.