The aim of this study to evaluate the microbial profile in gastritis and healthy patients in different periodontal conditions via next generation technologies.

This study aims to determine the density of bacteria associated with periodontal disease and to evaluate oral dysbiosis in gastritis patients using metagenomic analysis.

Inclusion Criteria:

• no systemic diseases other than gastritis non-smoker

Exclusion Criteria:

• Participants who took regular medications that could affect of periodontal tissue or oral microbiome pregnancy or lactation Patients who received periodontal treatment within the last 6 months

older than 18 years, have no systemic disease other than gastritis, non smoker participants