Fig. 2

Haptoglobin (A) and ferritin (B) concentrations before and after FIP treatment and in the control group of healthy cats. The Mann–Whitney U-test was used to test for statistically significant differences in haptoglobin (n = 7) and ferritin (n = 8) concentrations between FIP cats and the control group (n = 5) before and after therapy. A Wilcoxon signed-rank test was used to compare haptoglobin (n = 7) and ferritin (n = 8) concentrations before and after therapy. A value of p ≤ 0.05 was considered significant