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Helicobacter pylori in dental plaque and stomach of patients from Northern Brazil

World Journal of Gastroenterology 2010年第24期16卷 3033-3039页

作者： Mnica Baraúna Assumpo Luisa Caricio Martins Hivana Patricia Melo Barbosa katarine antonia dos santos barile Sintia Silva de Almeida Paulo Pimentel Assumpo Tereza Cristina de Oliveira Corvelo Endoscopy Department Joo de Barros Barreto University Hospital Immunopathology Laboratory Nucleus of Tropical Medicine Federal University of Pará Immunogenetics Laboratory Federal University of Pará Paulo Pimentel Assumpo Surgery Department Joo de Bar-ros Barreto University Hospital

AIM: To establish whether virulence factor genes vacA and cagA are present in Helicobacter pylori (H. pylori) retrieved from gastric mucosa and dental plaque in pa-tients with dyspepsia. METHODS: Cumulative dental plaque specimens and gastric biopsies were submitted to histological exami-nation, rapid urease test and polymerase chain reac-tion (PCR) assays to detect the presence of cagA and vacA ***: Detection of H. pylori from dental plaque and gastric biopsy samples was greater by PCR com-pared to histological examination and the rapid ure-ase test. DNA from H. pylori was detected in 96% of gastric mucosa samples and in 72% of dental plaque samples. Sixty-three (89%) of 71 dental plaque sam-ples that were H. pylori-positive also exhibited identical vacA and cagA genotypes in gastric mucosa. The most common genotype was vacAs1bm1 and cagA positive, either in dental plaque or gastric mucosa. These viru-lent H. pylori isolates were involved in the severity of clinical ***: These pathogenic strains were found simultaneously in dental plaque and gastric mucosa, which suggests that gastric infection is correlated with the presence of H. pylori in the mouth.

关键词： Helicobacter pylori Gastric mucosa Dental plaque cagA vacA

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