Histological analysis of positive bursa of Fabricius ( BF ) revealed atrophied follicles and lymphocyte depletion .
that the Brazilian TReoV isolates clustered in a single group with 98 - 100 % similarity to TReoV strains
Histological analysis of positive bursa of Fabricius ( BF ) revealed atrophied follicles and lymphocyte depletion .
Phylogenetic analysis based on S3 gene showed that the Brazilian TReoV isolates clustered in a single group with 98 - 100 % similarity to TReoV strains circulating in the United States .