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Prevalence of Porcine teschovirus genotypes in Hunan, China: identification of novel viral species and genotypes.
Journal of General Virology 2018 September
Porcine teschovirus (PTV) comprises at least 13 genotypes (PTV 1-13). Here, the genotypes of field strains prevalent among pig populations in Hunan Province, China, were identified. Multiple PTV genotypes, including all genotypes except PTV 7 and 8, were found co-circulating in the pig populations, reflecting a high genetic diversity. Moreover, we identified nine novel PTV genotypes, provisionally designated as PTV 14-22. PTV 21-HuN41 and PTV 21-HuN42 were successfully isolated, and their nearly complete genomes were sequenced. Homology comparison of the polyprotein genes of PTV 21-HuN41-42 to those of other known PTVs revealed low identities, ranging from 70.1 to 71.9 % (nucleotide identity) and 75.4 to 77.6 % (amino acid identity). Moreover, PTV 21-HuN41-42 were identified as a novel teschovirus species (tentatively Teschovirus B), based on the analyses of phylogenetics and evolutionary divergence. The findings of this study are expected to greatly enrich our knowledge of PTV genotypes.
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