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Immune responses of IgG, IgA and anti-CagA IgG to Helicobacter pylori in dyspeptic and peptic ulcer patients

, : Immune responses of IgG, IgA and anti-CagA IgG to Helicobacter pylori in dyspeptic and peptic ulcer patients. Orvosi Hetilap 138(16): 985-988

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%.


PMID: 9190550

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