HP and Parkinson disease: Anti-Hp antibodies were present in 33 (48.5%) HCs, (MS vs HC: p = ns, RRMS vs HC, p = ns; SPMS vs HC, p = ns, RRMS vs SPMS, p = ns), 14 (35.9%) PD (MS vs PD: p = ns) and 10 (47.6%) ALZ (MS vs ALZ: p = ns).