Updated project metadata. The aim of the study was to analyse differences in serum and urinary proteomes between healthy dogs and dogs with renal dysfunction in babesiosis using label-based high-resolution quantitative proteomic approach. In the study 8 healthy control dogs (group H) and 22 dogs with naturally occurring babesiosis were enrolled. Dogs with babesiosis were divided into 3 groups: group A consisted of 6 non-azotaemic dogs (serum creatinine <140 μmol/L) with normal UPC (UPC < 0.5), group B of 10 non-azotaemic dogs with proteinuria (UPC > 0.5) and group C of 6 azotaemic dogs (serum creatinine > 140 μmol/L) and significant proteinuria (UPC > 2).