Fig. 2From: Proteomic characterisation of bovine and avian purified protein derivatives and identification of specific antigens for serodiagnosis of bovine tuberculosisIndirect ELISA for serum reactivity from animals immunised with a aPPD or b bPPD against bPPD, aPPD and P22. As a negative control, serum was obtained from non-immunised mice (yellow line). The inset shows results obtained at serum dilutions of 1:128. OD optical densityBack to article page