helicobacter pylori bacteria infected in stomach . cute medical cartoon character . white background .

stomach gastritis helicobacter pylori bacteria cartoon character stomachache ache pain abdomen abdominal acid bacterial bacterium cell cute digestive disease dyspepsia flora gastric gastroesophageal reflux gastrointestinal gerd germ healthcare indigestion infection isolated loupe magnifying glass medical medicine micro microbiome microflora microorganism microscopic organism peptic prebiotics probiotics system tract ulcer vector