The decreased cytokine expression found in our study in the piglets from LSB-fed sows could be attributed to the dietary treatments because we know from Czyżewska-Dors et al. [27] that an infection with APP in seven-week-old piglets increased lung concentrations of IL-1β, IL-6, IL-8, and IFN-γ. This evidence concerns the gene CXCL8 and infection.