Fig. 3From: In vitro immune responses of porcine alveolar macrophages reflect host immune responses against porcine reproductive and respiratory syndrome virusesCytokine expression in PBMC cultures. a mRNA and b protein expression of cytokines in PBMCs and supernatants (n = 6), as determined by real-time PCR and ELISA, respectively, at 12, 36 and 72 hpi. Asterisks indicate significant differences in cytokine expression induced by each virus or stimulant compared with mock treatment or significant differences between JA142c and VR2332c (* indicates p ≤ 0.05, ** indicates p ≤ 0.01)Back to article page