Detection of African horse sickness viruses by dot-blot hybridization using a digoxigenin-labelled probe.

The research article discusses the development of a non-radioactive dot-blot hybridization assay, an efficient technique for detecting African horse sickness virus (AHSV), using a digoxigenin-labelled probe.

Methodology of Non-radioactive Dot-blot Hybridization Assay

• The research primarily aimed to develop a reliable and safe method for detecting AHSV. The process used genome segment 7 from 9 different AHSV serotypes and amplified them using Reverse Transcription Polymerase Chain Reaction (RT-PCR).
• Post amplification, the PCR products were denatured, which means they were exposed to conditions that altered their natural structure, and then immobilized on nylon membranes.
• These membranes were then exposed to a non-radioactive probe labelled with digoxigenin. The probe created for this experiment was 265 base pairs long, generated using genome segment 7 of AHSV serotype 4.
• The dot-blot was then brought into view using chemiluminescent detection, which involves the emission of light during a chemical reaction.

Results and Conclusion

• The results of the experiment were positive for PCR products amplified from all 9 AHSV serotypes. The same result was not achieved for other equine viruses or orbivirus isolates, which showcases the specificity of the probe for AHSV.
• The probe showed a high level of sensitivity towards AHSV, proving it to be highly effective in detecting this particular virus.
• The nature of this procedure, being non-radioactive, makes it safe to implement, while its simplicity and quick turnaround time make it a practical technique for regular and swift diagnosis of viral infections.
• The results suggest that this non-radioactive dot-blot assay could be an efficient tool in controlling and managing the incidence of African horse sickness by providing a swift and reliable diagnosis method.