Indexed research summary
Diagnostic investigation of avian reovirus field variants circulating in broiler chickens in Pennsylvania of United States between 2017 and 2022
Sequencing 72 avian reovirus isolates from Pennsylvania broiler flocks (2017-2022) found six genetically distinct genotype clusters circulating, with genotype V most common (33%) and amino acid identity to the commercial vaccine strains (1133, 1733, 2408, 2177) as low as 45%. Current vaccines are poorly matched to most field variants, so ongoing genotyping and autogenous/updated vaccine strategies are needed for reovirus control in broilers.
