ArticleMicroorganisms2026
Genomic and Pathogenicity Diversity of Six Avian Reovirus Strains with Different Genotypes.
Article in Microorganisms, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Avian reovirus (ARV) causes viral arthritis and leads to considerable economic losses in the poultry industry. In this study, six ARV strains of distinct genotypes (FJNP01-FJNP06) were isolated from commercial broiler farms. Through gene sequencing and pathogenicity assessment, we analyzed the genetic evolution and pathogenic characteristics of the σC, P10, σB, μB, and λC genes. Pathogenicity tests revealed that inoculation with FJNP01-FJNP06 by footpad or oral gavage induced symptoms in specific-pathogen-free (SPF) chickens, including mortality and growth retardation. Among the isolates, FJNP04 (genotype IV) showed the highest pathogenicity, causing increased mortality, weight loss, and severe lesions in the footpads and bursa of Fabricius, followed by FJNP05 and FJNP02. The pathogenicity of FJNP06 varied by inoculation route, with enhanced pathogenicity observed following oral gavage. In contrast, FJNP01 and FJNP03 demonstrated relatively low pathogenicity. Identity analysis indicated that σC and P10 were highly variable, σB was relatively conserved, while μB and λC displayed considerable divergence. Phylogenetic analysis placed FJNP01-FJNP06 into genotypes I to VI, respectively, forming six distinct branches on the σC and P10 phylogenetic trees, yet clustering more closely on the σB, μB, and λC trees. The pathogenicity of different genotypes of ARV varies, among which FJNP04 (genotype IV) exhibits the strongest pathogenicity. Genetic sequence analysis revealed that σC and P10 are highly variable, σB is relatively conserved, while μB and λC display a wide range of variation. This study provides insights into the genetic variation and pathogenic characteristics of ARV and serves as a reference for future research.
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