Fig. 2From: In vitro immune responses of porcine alveolar macrophages reflect host immune responses against porcine reproductive and respiratory syndrome virusesCytokine expression in PAM cultures. a mRNA and b protein expression of cytokines in PAMs and supernatants (n = 6), as determined by real-time PCR and ELISA, respectively, at 12, 24 and 36 hpi. Asterisks indicate significant differences in the 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