Table 2. The biochemical characteristics and identification of the 4 strains of Bifidobacterium isolated from fecal samples

Strain	Gram stain	Catalase	KOH	Identification	Identity (%)	Accession number
SY517	+	-	-	Bifidobacterium longum subsp. suillum	99	NR_145535.1
SY526	+	-	-	Bifidobacterium longum	99	NR_117506.1
SY615	+	-	-	Bifidobacterium animalis subsp. lactis	99	NR_040867.1
SY827	+	-	-	Bifidobacterium faecale	99	NR_133982.1