Oral microbial abundance (Porphyromonas, N. subflava, N. sicca, S. australis)

1. Cognitive impairment is associated with oral microbial abundance (Porphyromonas, N. subflava, N. sicca, S. australis) in humans.

   “Taxonomic analysis revealed an increasing abundance of the genus Porphyromonas , and species Neisseria subflava , Neisseria sicca , and Streptococcus australis from controls to MCI to dementia participants.”

   Humansin elderly participants with MCI or dementia

   Distinct Oral Microbiome Signatures in Cognitive Impairment: Metagenomic Insights from the Elderly MiaGB cohort

   AAIC 2025 abstract·25 Dec 2025

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