title: [Analysis on Helicobacter pylori infection and its related diseases in 1,442 children in Tianjin city].
abstract: OBJECTIVE
  The aim of this study was to investigate the prevalence of Helicobacter pylori (Hp) infection in children in Tianjin and to study the relationship between the Hp infection and its related diseases.
  
  
  METHODS
  (1) Serologic examination for Hp - IgG; (2) Rapid urease test for Hp (Hp - Rut); (3) Giemsa staining for Hp; (4) Gastric fluid examination for Hp by PCR. Hp infection were diagnosed by at least two criteria.
  
  
  RESULTS
  (1) Of the 1 442 children, 651 were Hp - IgG positive. The total positive rate was 45.15%, Positive rates of Hp - IgG among children under the age of 1 year, 3 years, 6 years, 10 years and to 14 years were 11.19%, 19.23%, 44.21%, 54.20% and 61.46%, respectively. (2) Positive rates of Hp - IgG were 31.18% (164/526) and 53.17% (48/916) in asymptomatic children and in patients with gastrointestinal symptoms. The rate was significantly higher in the later group (P < 0.005). (3) Hp infection rate in patients with duodenal ulcer (DU) was 90.76%, higher than that in other gastrointestinal diseases. (4) Histological examination showed that Hp infection rates were 33.20% and 83.97% in mild and moderate or severe gastritis, respectively.
  
  
  CONCLUSIONS
  (1) The prevalence of Hp infection in children in Tianjin was high. (2) Rate of Hp infection increased with age and Hp infection rate was higher in children with gastrointestinal symptoms than with asymptomatie. (3) There was a high correlation in children with gastroduodenal diseases and Hp infection especially with DU. (4) Hp positive rate correlated with the pathohistologic severity of gastritis.
authors.affiliation: Tianjin Children's Hospital, Tianjin 300074, China.
authors.forename: X
authors.initials: X
authors.lastname: Xu
authors.forename: F
authors.initials: F
authors.lastname: Liu
authors.forename: S
authors.initials: S
authors.lastname: Zhang
authors.forename: J
authors.initials: J
authors.lastname: Zhao
authors.forename: J
authors.initials: J
authors.lastname: Shi
mesh_terms: D000293:Adolescent; D000907:Antibodies, Bacterial / Q000097:blood; D002648:Child; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D005260:Female; D005773:Gastroscopy; D016481:Helicobacter Infections / Q000453:epidemiology*; D016480:Helicobacter pylori; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D015995:Prevalence
chemical_list: D000907:Antibodies, Bacterial; D007074:Immunoglobulin G