Table 2.

Performance and rumen fermentation parameters in lower SARA risk (LSR) and higher SARA risk (HSR) lambs.

Items	LSR	HSR	Pooled SEM	P-value
Initial BW, kg	22.16	23.03	0.67	0.531
Final BW, kg	35.06	35.38	0.80	0.849
DMI, kg/d	1.19	1.18	0.03	0.824
ADG, kg/d	0.258	0.247	0.01	0.391
DMI:ADG	4.61	4.78	0.12	0.523
Ruminal pH	6.55	6.17	0.08	0.013
Total VFA, mM	71.80	73.58	5.68	0.880
VFA molar ratios, mol/100 mol
Acetate	62.10	58.70	0.58	0.001
Propionate	25.17	29.36	1.00	0.033
Isobutyrate	0.89	0.67	0.07	0.114
Butyrate	9.82	9.58	0.65	0.860
Isovalerate	1.00	0.74	0.09	0.153
Valerate	1.02	0.94	0.04	0.405
Acetate:propionate	2.48	2.00	0.10	0.018
Lactate, mM	0.54	1.07	0.12	0.035
Bacteria, Log10 16S rRNA copy number/mL rumen fluid
Total bacteria	16.08	15.38	0.21	0.108
Total cellulolytic bacteria	12.35	10.33	0.24	<0.001
%in total bacteria × 10-3	40.35	6.29	10.24	0.008
Fibrobacter succinogenes	11.12	9.54	0.21	<0.001
Ruminococcus flavefaciens	11.83	9.23	0.32	<0.001
Ruminococcus albus	11.10	9.22	0.25	<0.001
Butyrivibrio fibrisolvens	11.87	9.98	0.24	<0.001
Prevotella brevis	10.26	9.57	0.17	0.132
Streptococcus bovis	7.92	7.33	0.11	0.030
Selenomonas ruminantium	12.38	11.52	0.13	<0.001