title: [Immune responses of IgG, IgA and anti-CagA IgG to Helicobacter pylori in dyspeptic and peptic ulcer patients].
abstract: The anti-H. pylori IgG, IgA, and anti CagA responses in dyspeptic patients have been evaluated. Of 481 patients 76% tested positive for IgG anti-H. pylori, 57% for anti-CagA, and 52% IgA for anti H. pylori. There was a significant age-related increase in IgG anti-H. pylori and IgA anti-H. Pylori prevalence, whereas anti-CagA positives were unreliable in this respect. The IgG seropositivity was the highest (93%) in duodenal ulcers (DU), 82% in antral gastritis and/or bulbitis (AG +/- /B), and 71% in gastric ulcer (GU). GU patients compared with DU and AG +/- /B ones tended to have the highest IgA anti-H. pylori prevalence (78% vs. 66% and 61%). The anti-CagA seropositivity was the most pronounced (80%) in DU followed by GU (72%) and AG +/- /B (68%). It is suggested that the serodiagnosis including IgG, IgA anti-H. pylori and anti-CagA determinations can not replace endoscopy in revealing the exact nature of gastroduodenal lesions. IgA anti-H. pylori determination in female patients with GU can be a valuable diagnostic tool. It is stated that in Hungary the prevalence of CagA positive H. pylori strains in anti-H. pylori IgG positive dyspeptic patients is 85%.
authors.affiliation: Semmelweis Orvostudományi Egyetem Oktató Kórház.
authors.forename: K
authors.initials: K
authors.lastname: Tamássy
authors.forename: P
authors.initials: P
authors.lastname: Auli
authors.forename: B
authors.initials: B
authors.lastname: Fekete
authors.forename: C
authors.initials: C
authors.lastname: Antonello
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000942:Antigens, Bacterial / Q000276:immunology; D001426:Bacterial Proteins / Q000276:immunology; D005260:Female; D016480:Helicobacter pylori / Q000187:drug effects* / Q000276:immunology; D006801:Humans; D006814:Hungary / Q000453:epidemiology; D007070:Immunoglobulin A / Q000276:immunology; D007074:Immunoglobulin G / Q000276:immunology; D008875:Middle Aged; D010437:Peptic Ulcer / Q000453:epidemiology / Q000276:immunology* / Q000382:microbiology; D012737:Sex Factors
chemical_list: D000942:Antigens, Bacterial; D001426:Bacterial Proteins; D007070:Immunoglobulin A; D007074:Immunoglobulin G; C080866:cagA protein, Helicobacter pylori