Porcine circovirus 3 (PCV-3) variability: Is it in the virus or in the classifcation criteria?
2023
Franzo, Giovanni | Segalés, Joaquim | Producció Animal | Sanitat Animal
The continuous discovery of new viruses during the last decades has increased the need for new classification approaches and rules. Currently, the International Committee on Taxonomy of Viruses classifies viruses up to the species level. However, because of the higher variability of most of these infectious agents, a below-species categorization is often required for proper epidemiological investigations. Unfortunately, variable criteria are typically proposed by different research groups, leading to misleading and poorly reproducible results. This scenario occurred for the recently identified Porcine circovirus 3. Although genotype definition standards had been defined by a group of experts in the field, recent articles have been published introducing new genotypes, whose classification rules are not reported. We therefore would like to stress the usefulness of defining and maintaining a common language to allow proper results comparison among groups. We consider the consensus opinion of a heterogeneous expert team as the most valuable approach. Nevertheless, if other approaches are proposed, the disclosure of the criteria and the comparison with previous literature should be deemed mandatory to allow effective results reproducibility, interpretation and sharing.
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