Table 1.

Species of gram-negative bacteria exhibiting alteration in animal models of Alzheimer’s disease

Source	Subject	Method	Gram-negative bacteria						References
Source	Subject	Method	Phylum	Class	Order	Family	Genus	Species	References
Feces	APP/PS1 mice	PCR	Proteobacteria			Helicobacteraceae Desulfovibrionaceae	Helicobacter		[33]
		PCR	Bacteroidetes	Bacteroidia	Bacteroidales	Porphyromonoadaceae	Odoribacter		[33]
		PCR	Bacteroidetes						[50]
		PCR	Bacteroidetes						[32]
			Bacteroidetes	Bacteroidia	Bacteroidales	Rikenellaceae
			Bacteroidetes	Bacteroidia	Bacteroidales	S24-7
			Verrucomicrobia	Verrucomicrobiae	Verrucomicrobiales	Akkermansiaceae	Akkermansia
		PCR	Bacteroidetes						[34]
	5×FAD mice	PCR	Proteobacteria	δ-, γ-, ε-Proteobacteria		Helicobacteriaceae, Pseudomonadaceae			[23]
		PCR	Bacteroidetes	Bacteroidia	Bacteroidia	Prevotellaceae			[23]
		PCR	Bacteroidetes						[35]
		PCR	Bacteroidetes	Bacteriodia	Bacteroidales	Muribaculaceae			[10]
	5×FAD mice 3×Tg mice	PCR	Bacteroidetes						[51]
	5×FAD mice 3×Tg mice	PCR	Proteobacteria						[51]

PCR Polymerase chain reaction