title: [Distribution of Helicobacter pylori in stomach before and after the administration of Lansoprazole].
abstract: OBJECTIVE
  To investigate the effect of the acid inhibitor-Lansoprazole on the distribution of Helicobacter pylori (H.pylori) in stomach.
  
  
  METHODS
  Biopsy specimens were taken from the duodenal ulcer patients who underwent gastroscopy before and after the treatment of Lansoprazole. The biopsy specimens were taken from the lesser curvature of the antrum and the greater curvature of the corpus respectively. H&E and Warthin-Starry staining were used for detecting the changing of active gastritis and the positive rate of H.pylori.
  
  
  RESULTS
  (1)The positive rates of H.pylori before treatment, 4 weeks after treatment and 3 months after treatment, in the lesser curvature of the antrum were 93.02%, 58.14%, and 86.05%, respectively. The positive rate and density of H.pylori 4 weeks after treatment were greatly decreased compared with those before treatment (P<0.001) and also lower than those 3 months after treatment (P<0.05). (2) The positive rate of H.pylori before treatment, 4 weeks after treatment and 3 months after treatment in greater curvature had differences without statistical significance. However, the density of H.pylori 4 weeks after treatment was increased compared with that before treatment.
  
  
  CONCLUSIONS
  Lansoprazole can change the colonization site of H.pylori in the stomach, decrease the positive rate and the density of H.pylori in lesser curvature of the antrum, but increase the density of H.pylori in the greater curvature of the corpus. This effect is most obvious in one month after treatment. Active gastritis is related to H.pylori.
authors.affiliation: Department of Gastroenterology, Peking University Third Hospital, Beijing 100083, China.
authors.forename: Zhu
authors.initials: Z
authors.lastname: Jin
authors.forename: Xiu-yun
authors.initials: XY
authors.lastname: Dong
authors.forename: San-ren
authors.initials: SR
authors.lastname: Lin
authors.forename: Si-mao
authors.initials: SM
authors.lastname: Ye
authors.forename: Li-ya
authors.initials: LY
authors.lastname: Zhou
authors.forename: Hong-yan
authors.initials: HY
authors.lastname: Cheng
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles / Q000627:therapeutic use*; D000897:Anti-Ulcer Agents / Q000627:therapeutic use; D004381:Duodenal Ulcer / Q000188:drug therapy* / Q000382:microbiology; D005753:Gastric Mucosa / Q000382:microbiology; D005756:Gastritis / Q000382:microbiology; D016481:Helicobacter Infections / Q000188:drug therapy*; D016480:Helicobacter pylori / Q000187:drug effects*; D006801:Humans; D064747:Lansoprazole; D013270:Stomach / Q000382:microbiology*
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000897:Anti-Ulcer Agents; D064747:Lansoprazole