<prompt> All of the following belong to the group of microbial sensors, EXCEPT:TLRsNOD-like receptors NLRsMDA-5None of the above  <response>: When a pathogen enters the skin, it is confronted with macrophages and other phagocytic cells possessing microbial sensors. There are three major groups of microbial sensors: 1 TLRs, 2 NOD-like receptors NLRs, and 3 RIG-1 like helicases and MDA-5. Ref: Brooks G.F. 2013. Chapter 8. Immunology. In G.F. Brooks Ed, Jawetz, Melnick, Adelbergs Medical Microbiology, 26e. 