HP and Parkinson disease: Three of the 14 anti-Hp antigen antibodies were significantly less frequent in RRMS than in both PD and ALZ; p54-flagellin (RRMS vs PD: 9.8 vs 42.9%, p = 0.012), p41 (RRMS vs PD: 12.2 vs 71.4%, p = 0.000; RRMS vs ALZ: 12.2 vs 60%, p = 0.004) and p29-UreA (RRMS vs PD: 31.7 vs 85.7%, p = 0.001; RRMS vs ALZ: 31.7 vs 70%, p = 0.036) (Table 2).