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The interferon sensitivity of selected porcine viruses
1Department of Veterinary Microbiology and Immunology, Ontario Veterinary College, University of Guelph.
Summary
This study compared porcine interferon-alpha and interferon-beta antiviral effects against 11 pig viruses. Vesicular stomatitis virus showed the highest sensitivity to both interferons.
Area of Science:
- Veterinary Virology
- Immunology
Background:
- Porcine interferons (IFNs) are crucial for antiviral defense in pigs.
- Understanding the differential sensitivity of swine viruses to IFNs is vital for developing effective control strategies.
Purpose of the Study:
- To compare the antiviral efficacy of porcine interferon-alpha and porcine interferon-beta against eleven distinct porcine viruses.
- To determine the sensitivity of various swine viruses to interferon treatment before and after viral challenge.
Main Methods:
- Yield reduction assays were performed using pig kidney cells.
- Cells were treated with porcine interferon-alpha (from infected piglets) or porcine interferon-beta (recombinant) before and/or after challenge with 11 different porcine viruses.
- Virus yield was measured to assess interferon sensitivity.
Main Results:
- Vesicular stomatitis virus was the most sensitive to both porcine interferon-alpha and interferon-beta.
- Porcine interferon-alpha showed high sensitivity against bovine herpesvirus type 1, hemagglutinating encephalomyelitis virus, and porcine enteroviruses.
- Porcine interferon-beta demonstrated high sensitivity against porcine adenovirus type 3, swine influenza, hemagglutinating encephalomyelitis virus, and porcine rotavirus.
Conclusions:
- Different porcine viruses exhibit varying sensitivities to porcine interferon-alpha and interferon-beta.
- Interferon treatment strategies may need to be tailored based on the specific virus and its sensitivity profile.
- Further research into interferon-based therapies for swine viral diseases is warranted.