title: Study of gastrointestinal infections.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D005767:Gastrointestinal Diseases / Q000188:drug therapy; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D010118:Oxytetracycline / Q000627:therapeutic use
chemical_list: D010118:Oxytetracycline