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Intestinal changes of HSP70, TLR4, and NF-κB gene expressions in Escherichia coli–infected Ma chickens loaded with heat stress. A quantitative RT-PCR analysis of HSP70, TLR4, and NF-κB mRNA in Ma chickens were measured. (A) HSP70, (B) TLR4, and (C) NF-κB gene expression changes in the small intestine. #P < 0.05, ##P < 0.01 vs. control group; ∗P < 0.05, ∗∗P < 0.01 vs. E. coli group.
