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The relative expression of IL-6, IFN-β, TNF-α and IL-8 in susceptible (open bars) and resistant (filled bars) chickens at 8 h and 16 h after infection with S.enteritidis is shown. Data are means (n = 6), normalized to β-actin mRNA and the average expression at 0 h (**P<0.01). The vertical bar is the SD from the error mean square of the ANOVA. HPI is hours post-infection.
