In the duodenum, TLR2, TLR7, and TLR21 mRNA expression levels showed an increasing trend with increasing cold stimulation time at 36 d, and the expression levels in the CS6 group were significantly higher than those in the CS0 group ( P < 0.05).
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Effect of intermittent mild cold stimulation on intestinal immune function and the anti-stress ability of broilers.
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The sentences
The HSP90 mRNA expression level showed a trend of first increasing and then decreasing with increasing intermittent cold stimulation time, the differences between the groups were significant, and the expression level in the CS6 group was significantly higher than that in the CS0 group ( P < 0.05).