extremely significantP < 0.001
the results showed that the survival of Δ pdh strains in RAW264.7 cells was significantly decreased at 4 h, 6 h and 8 h compared with WT and CΔ pdh strains, and the difference was extremely significant ( P < 0.001), while there was no significant difference between WT and CΔ pdh strains ( P > 0.05) ( Figure 7 ).