Indwara ya Helicobacter itera kwandura no gukingira indwara, hamwe no kwangirika kwa selile, necrosis, hamwe no kwinjira mu ngirabuzimafatizo zigaragara mu mucyo wanduye wa gastrica, kandi antibodi zihariye zishobora kuboneka muri serumu.Helicobacter ifitanye isano n'indwara zitandukanye nka gastrite, ibisebe bya peptike, kanseri yo mu gifu, lymphoide tissue lymphoma (MALT lymphoma), NSAID ifitanye isano na gastropathie ikora dyspepsia na GERD.