In our study, TLR2 (but not TLR6) was found to be up regulated in both S. aureus WCH-SK2WT and WCH-SK2SCV infection (i.e., intracellular WCH-SK2WT and WCH-SK2SCV, and extracellular WCH-SK2SCV infection). This evidence concerns the gene TLR2 and infection.