4.6 Article

Autoimmune thyroid diseases and Helicobacter pylori: The correlation is present only in Graves's disease

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WORLD JOURNAL OF GASTROENTEROLOGY
卷 18, 期 10, 页码 1093-1097

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BAISHIDENG PUBLISHING GROUP INC
DOI: 10.3748/wjg.v18.i10.1093

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Autoimmunity; Cag-A; Graves' disease; Hashimoto's thyroiditis; Helicobacter pylori; Hyperthyroidism; Hypothyroidism

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AIM: To investigate the correlation between autoimmune thyroid diseases (ATDs) and the prevalence of Cag-A positive strains of Helicobacter pylori (H. pylori) in stool samples. METHODS: Authors investigated 112 consecutive Caucasian patients (48 females and 4 males with Graves' disease and 54 females and 6 males with Hashimoto's thyroiditis HT), at their first diagnosis of ATDs. Authors tested for H. pylori in stool samples using an amplified enzyme immunoassay and Cag-A in serum samples using an enzyme-linked immunoassay method (ELISA). The results were analyzed using the two-sided Fisher's exact test and the respective odds ratio (OR) was calculated. RESULTS: A marked correlation was found between the presence of H. pylori (P <= 0.0001, OR 6.3) and, in particular, Cag-A positive strains (P <= 0.005, OR 5.3) in Graves' disease, but not in Hashimoto's thyroiditis, where authors found only a correlation with Cag-A strains (P <= 0.005, OR 8.73) but not when H. pylori was present. CONCLUSION: The marked correlation between H. pylori and Cag-A, found in ATDs, could be dependent on the different expression of adhesion molecules in the gastric mucosa. (c) 2012 Baishideng. All rights reserved.

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