ArticleFrontiers in cellular and infection microbiology2026
Absolute quantification by mouthwash testing screens severe periodontitis and tracks species-specific microbial response to periodontal therapy.
Article in Frontiers in cellular and infection microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Non-invasive molecular tools that can both screen for severe periodontitis and quantify treatment-associated pathogen changes remain an unmet need. We evaluated a non-invasive multiplex quantitative polymerase chain reaction (qPCR) mouthwash panel providing absolute colony-forming-unit (CFU) quantification of five periodontal pathogens ( Methods: Treatment-response monitoring was assessed in a real-world retrospective cohort (349 patients, 703 visits; 235 paired pre/post-treatment samples) using paired Wilcoxon signed-rank tests and Jonckheere-Terpstra trend tests across baseline stage. Screening performance was independently evaluated in a prospective cross-sectional cohort (n=87; 31 healthy, 56 Stage III/IV) with leave-one-out cross-validation (LOOCV) and a pre-specified sensitivity analysis. Results: For screening, LOOCV AUC was 0.96 for Conclusion: In this two-cohort evaluation, a single non-invasive mouthwash qPCR test provided two linked clinical outputs: high-accuracy screening for severe periodontitis and quantitative individual-level tracking of species-specific microbial response to therapy. These findings are preliminary, derive from a single-center screening cohort and a retrospective monitoring cohort, and require external validation before clinical deployment. By placing pathogen loads on the same absolute CFU scale, the assay supports both cross-sectional disease detection and longitudinal residual-burden monitoring as an adjunct to the 2018 AAP/EFP framework. Clinical Research Information Service (CRIS) registration: KCT0011511 (https://cris.nih.go.kr).
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