Fig. 7

IHNV infection leads to dysbiosis of trout OM microbiota. a, b Richness and diversity of bacterial community in the Cor, BC, and FC of control and IHNV-infected fish at 4 and 28 DPI (n = 4), measured with Chao1 and Simpson index, respectively. c, d Circos plots display the corresponding abundance of samples in relation to bacterial communities at the phylum (c) and order (d) levels. e Relative abundance (%) of the top six bacteria (phylum) in the Cor, BC, and FC. f Relative abundance (%) of the top six bacteria (order) in the Cor, BC, and FC. Statistical differences were assessed by unpaired Student’s t test. Data are presented as mean ± SEM of three biological duplicates. *p < 0.05, **p < 0.01, ***p < 0.001