Blood cells in carp from different carp strains under CEV infection. Depicted are total and differential blood cell counts: (a) number of red blood cells (RBC), (b) number of white blood cells (WBC), (c) percentage of granulocytes, lymphocytes and thrombocytes during CEV V experiment in two strains of carp, (d) RBC, (e) WBC, (f) percentage of granulocytes, lymphocytes and thrombocytes in fish used for metabolomics studies. Total and differential blood cell counts show leukopenia and granulocytosis in infected specimen from the KSD susceptible koi strain. Analysis was performed with t-test or two-way ANOVA with strain and time-points as factors. The ANOVA was followed by subsequent pairwise multiple comparisons using the Holm-Sidak method. Significant differences between the control and infected specimens and between strains are marked with * at p ≤ 0.05, with ** at p ≤ 0.01, with *** at p ≤ 0.001. RBC and WBC are presented as box plots of 25% – 75% percentiles (± minimum and maximum values) with an indication of median as a horizontal line. The mean percentage of granulocytes, lymphocytes and thrombocytes are presented as a bar (+SD)