The invasiveness of Salmonella Typhimurium WT (A) and its isogenic ΔSipB (B) in porcine pulmonary macrophages whether or not exposed to 0.025 μg/mL of DON is shown. The number of gentamicin-protected bacteria is shown. The results show a representative of three independent experiments conducted in sixfold ± standard deviation for Salmonella Typhimurium WT and of two independent experiments conducted in sixfold ± standard deviation for the deletion mutant in SipB.