Perspectives on molecular detection methods of lyssaviruses

Area of Science:

• Virology
• Molecular Biology
• Public Health

Background:

• Lyssaviruses, part of the Rhabdoviridae family, possess negative-stranded RNA genomes.
• While canine rabies causes most human fatalities, bat lyssaviruses also pose a significant public health threat.
• High genetic variability among lyssaviruses complicates the development of broad-detection diagnostic tools.

Purpose of the Study:

• To evaluate and compare various published PCR-based systems for detecting a wide range of lyssaviruses.
• To assess the performance of one-step and two-step real-time RT-PCR assays for lyssavirus detection.
• To provide an overview of advanced molecular methods for lyssavirus identification.

Main Methods:

• Testing of diverse published PCR systems and primers using real-time RT-PCR.
• Comparison of one-step and two-step RT-PCR assay formats.
• Evaluation of different reverse transcription chemistries for two-step assays.

Main Results:

• Most tested one-step real-time RT-PCR systems demonstrated superior performance compared to optimized two-step assays.
• One-step assays reduced assay time and minimized the risk of cross-contamination.
• Differences in sensitivity were observed among two-step assays based on RT-chemistry.

Conclusions:

• One-step real-time RT-PCR assays are advantageous for sensitive and efficient detection of diverse lyssaviruses.
• Optimized molecular diagnostic tools are essential for global rabies control efforts.
• Further exploration of state-of-the-art molecular methods can enhance lyssavirus detection and differentiation.