The virulence differences of C. sakazakii isolates were determined by animal experiment and histological analysis.
Proteomic profiles of virulent and attenuated isolates were firstly developed by 2-DE.
Potential virulence factors such as Dps, OmpA, LuxS were identified by MAIDI/TOF/TOF coupled with MS.
Expression abundance of Dps, OmpA, and LuxS genes in G362 were increased using qPCR.