Viral Fitness and Virulence in Foot-and-Mouth Disease Virus
Author Information
Author(s): Mónica Herrera, Juan García-Arriaza, Nonia Pariente, Cristina Escarmís, Esteban Domingo
Primary Institution: Centro de Biología Molecular “Severo Ochoa” (CSIC-UAM), Cantoblanco, Madrid, Spain
Hypothesis
Can viral fitness and virulence be unrelated traits in foot-and-mouth disease virus?
Conclusion
The study shows that viral fitness and virulence can evolve independently, with mutations affecting fitness not necessarily impacting virulence.
Supporting Evidence
- Viral fitness and virulence were measured in the same biological environment.
- High fitness did not correlate with high virulence in the studied virus clones.
- Mutations affecting fitness were mapped throughout the genome, while virulence determinants were concentrated in specific regions.
Takeaway
This study found that a virus can be good at making copies of itself but not very good at making its host sick, or vice versa.
Methodology
The study involved passaging foot-and-mouth disease virus in cell cultures and measuring both fitness and virulence through cell killing assays.
Limitations
The findings may not apply to natural hosts of the virus, as the study was conducted in a controlled laboratory environment.
Digital Object Identifier (DOI)
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