Fig. 2From: Immunogenicity and protective efficacy of a Salmonella Enteritidis sptP mutant as a live attenuated vaccine candidateBacterial colonization in cells. Salmonella adhesion and invasion in the Human epithelial Caco-2 BBE cells (a), and mouse macrophage RAW264.7 cells (b). The number of Salmonella was determined and presented as 102 CFU/mL. Data are expressed as the mean ± SEM. **P ≤ 0.01Back to article page