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Expression of pro-inflammatory (IL-6) or anti-inflammatory TGF-β4) cytokine mRNA in the ceca from experimental chickens with persistent colonization by Salmonella Enteritidis. The expression of cytokine mRNA was determined by quantitative RT-PCR. Data represent the fold change in mRNA expression in the cecum from infected chickens when compared to the mRNA expression in the cecum from non-infected chickens. Data represent the mean ± SEM from three separate experiments.
