IntroductionInnate immunity is evolutionarily conserved and acts as the first line of host defence against pathogen infections. Detection of microbial pathogen is an essential step in the initiation of innate immune responses and is mediated by pattern recognition receptors (PRRs; Janeway & Medzhitov 2002; Takeuchi & Akira 2010). PRRs are microbial sensors of the innate immune system that can re..