Feeding broiler chickens with arginine above recommended levels: effects on growth performance, metabolism, and intestinal microbiota

Table 4 Bacteria showing different relative abundance (%) in the caecal content of CON and ARG birds at D49

Bacteria	Treatment^a		P-value	Variation^b
Bacteria	CON	ARG	P-value	Variation^b
Phylum
Proteobacteria	1.70	0.14	0.018	↓
Bacteroidetes	72.3	80.9	0.041	↑
Firmicutes	19.0	14.6	0.087	↓
Class
Coriobacteriia	0.19	0.42	0.010	↑
Gammaproteobacteria	1.70	0.14	0.018	↓
Firmicutes (unclassified)	4.80	2.58	0.041	↓
Bacteroidia	72.3	80.9	0.041	↑
Clostridia	13.5	9.35	0.043	↓
Order
Eggerthellales	0.19	0.42	0.010	↑
Enterobacterales	1.70	0.14	0.018	↓
Firmicutes (unclassified)	4.80	2.58	0.041	↓
Bacteroidales	72.3	80.9	0.041	↑
Clostridiales	13.5	9.35	0.043	↓
Family
Eggerthellaceae	0.19	0.42	0.010	↑
Enterobacteriaceae	1.70	0.14	0.018	↓
Firmicutes (unclassified)	4.80	2.58	0.041	↓
Genus
Gordonibacter	0.19	0.42	0.010	↑
Escherichia	1.70	0.14	0.018	↓
Firmicutes (unclassified)	4.80	2.58	0.041	↓
Flavonifractor	1.57	0.81	0.059	↓
Species
Gordonibacter pamelaeae	0.19	0.42	0.010	↑
Escherichia coli	1.70	0.14	0.018	↓
Lactobacillus salivarius	0.01	0.06	0.030	↑
Firmicutes bacterium CAG 94	4.80	2.58	0.041	↓
Lachnoclostridium An131	0.33	0.13	0.091	↓

ISSN: 2049-1891