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- W2105244080 abstract "Helicobacter pylori is an important gastrointestinal pathogen associated with gastritis, peptic ulcers, and an increased risk of gastric carcinoma. The oral cavity has been indicated as a possible H. pylori reservoir, and may therefore be involved in the reinfection of the stomach which sometimes follows treatment of H. pylori infection. The objective of the present study was to evaluate the prevalence of H. pylori as detected by polymerase chain reaction (PCR) in the oral cavity of periodontitis patients testing positive for this bacterium in the stomach. Thirty adult patients with alterations of the superior digestive tract, testing urease positive after endoscopy and biopsy, were selected. A full‐mouth periodontal examination was performed in every patient and the subjects were allocated to two groups: gingivitis (15 patients) and chronic periodontitis (15 patients). Plaque and saliva samples collected from each patient were stored in 0.5 ml of TE buffer. DNA was extracted from the samples by the boiling method and was evaluated for the presence of H. pylori using the PCR method. JW 22/23 primers were used. The DNA of ATCC H. pylori 43629 (positive control) and water (negative control) were used for controlling the reactions. Of the 30 evaluated patients, 13 (43.3%) harbored H. pylori in the mouth. The bacterium was not found on the dorsum of the tongue of any patient, but was found in saliva in three patients (10%), in the supragingival plaque in six patients (20%), and in the subgingival plaque in eight patients (26.6%). The presence of H. pylori was similar in the gingivitis and chronic periodontitis groups. In conclusion, a high percentage of patients harbored H. pylori in their mouth. The bacterium was detected in saliva, supragingival and subgingival plaque, suggesting that these sites may be considered reservoirs for H. pylori in urease‐positive patients." @default.
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- W2105244080 date "2004-06-22" @default.
- W2105244080 modified "2023-10-17" @default.
- W2105244080 title "Prevalence of Helicobacter pylori detected by polymerase chain reaction in the oral cavity of periodontitis patients" @default.
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- W2105244080 doi "https://doi.org/10.1111/j.1399-302x.2004.00153.x" @default.
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