Furthermore, polymorphisms in other microbial pattern recognition receptors and one intestinal mucin were also associated with PD risk; where PGLRYP2 rs892145 and TLR1 rs4833095 were significant in the APDR cohort, while TLR2 rs3804099 and MUC2 rs11825977 were significant in the PPMI cohort. This evidence concerns the gene MUC5AC and Parkinson disease.