TABLE 3.

Abundance of bacterial 16S rDNA sequences (n = 619) isolated from the cecal floras of broiler chickens

Group	Class	Genus or species	Abundance of sequence (no. of sequence [%]) at day:
			3	7	14	21	28	49
Low G+C, gram positive	Lactobacillaceae	Lactobacillus spp.	3 (2.86)			1 (1.01)	1 (0.88)
		L. acidophilus	8 (7.62)	1 (1.08)	4 (3.60)			4 (4.12)
		L. crispatus	1 (0.95)	3 (3.23)	3 (2.70)
		L. delbrueckii	14 (13.33)		2 (1.80)
		L. reuteri			1 (0.90)			1 (1.03)
		L. aviarius						1 (1.03)
		Weissella spp.	1 (0.95)		1 (0.90)			1 (1.03)
	Clostridiaceae	Clostridium spp.	33 (31.43)	56 (60.22)	42 (37.84)	25 (25.25)	34 (29.82)	33 (34.02)
		C. perfringens	13 (12.38)
		C. lactofermentum					2 (1.75)	1 (1.03)
		C. orbiscindens				4 (4.04)
		Ruminococcus	7 (6.67)	16 (17.20)	29 (26.13)	16 (16.16)	18 (15.79)	16 (16.49)
		Eubacterium spp.	1 (0.95)	7 (7.53)	10 (9.00)	11 (11.11)	10 (8.77)	22 (22.68)
	Bacillaceae	Bacillus			3 (2.70)	4 (4.04)	2 (1.75)
	Streptococcaceae	Streptococcus	3 (2.86)					1 (1.03)
	Enterococcaceae	Enterococcus faecium	2 (1.90)	2 (2.15)	1 (0.90)			1 (1.03)
		Enterococcus durans						1 (1.03)
High G+C, gram positive	Fusobacteriaceae	Fusobacterium spp.		2 (2.15)	10 (9.00)	27 (27.27)	40 (35.09)	7 (7.22)
Proteobacteria (gram negative)	α	Ochrobacter anthropi	5 (4.76)
	β	Achromobacter xylosoxidans	4 (3.81)
		Alcaligenes sp.
	γ	Escherichia coli	7 (6.67)		1 (0.9)
Cytophaga/Flexibacter/Bacteroides	Flavobacteriaceae	Flavobacterium ferrugineum	1 (0.95)
	Bacteroidaceae	Bacteroides	1 (0.95)	5 (5.38)	4 (3.60)	10 (10.10)	6 (5.26)	5 (5.15)
Unknown bacteria			1 (0.95)	1 (1.08)		1 (1.01)	1 (0.88)	3 (3.09)
Total			105	93	111	99	114	97