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. 2024 Dec 28;20:584. doi: 10.1186/s12917-024-04411-2

Fig. 2.

Fig. 2

The impact of heat stress on serum IL-6 (A), TNF-α (B) and CORT (C) concentrations in broilers of different days of age. TN denotes the normal group; HS denotes the heat stress group; data were expressed as mean ± SD (n = 5). P < 0.01 indicates a highly significant difference, P < 0.05 indicates a significant difference and P > 0.05 indicates NS (∗P < 0.05, ∗∗P < 0.01)