Human defense cells have toll-like receptors on their surface that are engaged in innate immunity.
These receptors focus on certain bacterial antigens, allowing the host defense to quickly and effectively eradicate the bacterium. The O-antigen of E. coli is targeted by toll-like receptors on the surface of NK cells.
It is true that bacteria develop on host surfaces as films. In order to resist host defense, bacteria create coagulated bulk. A protective material is frequently produced by this capsular bulk.
TLR are receptors that recognize pathogens and are present in cell membranes. -they are triggered by PAMPs, and after binding, that specific cell releases cytokines.
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