TLR5 and infection: Keratinocyte infection with ∆fliC (Fla−) or triple mutant strains (ΔfliCΔxcpQΔpscF; Fla−/T2SS−/T3SS−) or with wild-type strain in presence of TLR5 blocking antibody resulted in significantly reduced mRNA expression and secreted levels of chemokines.