TLR2 and biological process involved in symbiotic interaction: TLR2 mediates cell activation by the recognition of microorganisms and microbial products, and also is involved in the defense and elimination of parasites infection, including Plasmodium falciparum (Zhu et al., 2011), Toxoplasma gondii (Mun et al., 2003), and Trypanosoma cruzi (Campos et al., 2001).