- Lower alpha-diversity in AD-group (method?) - Higher abndance in AD-group of Moraxella, Leptotrichia, Sphearochaeta (genus) - Lower abundance in AD-group of Rothia (genus) - Significant association of APOE4-genotype with higher abundance of Abiotrophia and Desulfomocrobium and lower abundance of Actinomyces and Actinobacillus (genus). Here, APOE is linked to Alzheimer disease.