Kinetics of IFN-γ released after stimulation of whole blood with tuberculins in the vaccinated group. Avian tuberculin (PPD-A, ▲), bovine tuberculin (PPD-B, ■). Results are expressed as mean ΔOD450 (mean of OD450 of antigen-stimulated values with unstimulated values subtracted) ± 95% confidence interval.
Pérez de Val et al. BMC Veterinary Research 2012 8:191 doi:10.1186/1746-6148-8-191