Fig. 4From: Design of an oral vaccine using Lactococcus lactis against brucellosis: an in vitro and in vivo studyMeasurement of serum levels of IFN-γ, TNF-α, IL-10 and IL-4 cytokines by ELISA method. *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001Back to article page