IFN-γ production and MTT reduction to formazan of PBMC after PPDB stimuli. 

IFN-γ production in mean OD ± SD(Graphic 1A) and metabolic activity of PBMC after PPDB stimuli measured through MTT stimulation index in mean percentages ± SD (Graphic 1B). PBMC were from cows PPDbEPPp , PPDbNoEPPp ▨, NoPPDbEPPp  and NoPPDbNoEPPp  ░.