Table 1.

Phyla, Major Families, and Genera in the Microbiome of Age-related Cognitive Decline.

Phylum	Major Families	Major Genera
Firmicutes	Lachnospiraceae, Ruminococcaceae, Clostridiaceae	Faecalibacterium, Roseburia
	Erysipelotrichaceae	Eubacterium, Clostridium
Bacteroidetes	Bacteroidaceae, Prevotellaceae	Bacteroides, Prevotella
	Rikenellaceae, Porphyromonadaceae	Parabacteroides, Alistipes
Actinobacteria	Bifidobacteriaceae	Bifidobacterium
	Coriobacteriaceae	Collinsella
Proteobacteria	Enterobacteriaceae	Escherichia, Klebsiella
	Desulfovibrionaceae	Desulfovibrio