. 2021 Jan 15;7:600772. doi: 10.3389/fvets.2020.600772

Table 4.

Effect of dietary supplementation with different types of B. subtilis on short-chain fatty acid concentration of colonic contents of weaned piglets (μg/g).

Items	Control group	BS-A group	BS-B group	BS-C group
Day 7
Acetate	3.12 ± 0.17^a ^b	3.31 ± 0.25^a	2.60 ± 0.21^b	2.78 ± 0.08^a ^b
Propionate	1.12 ± 0.03^a ^b	1.41 ± 0.14^a ^b	1.09 ± 0.10^b	1.74 ± 0.36^a
Butyrate	0.80 ± 0.06	0.80 ± 0.08	0.69 ± 0.04	1.01 ± 0.21
Isobutyrate	0.07 ± 0.01	0.07 ± 0.01	0.08 ± 0.01	0.09 ± 0.02
Valerate	0.18 ± 0.05	0.15 ± 0.02	0.10 ± 0.01	0.16 ± 0.04
Isovalerate	0.11 ± 0.02	0.12 ± 0.02	0.14 ± 0.02	0.15 ± 0.03
Day 21
Acetate	3.06 ± 0.05	3.25 ± 0.27	2.64 ± 0.22	3.06 ± 0.16
Propionate	1.61 ± 0.05	1.67 ± 0.12	1.55 ± 0.03	1.73 ± 0.19
Butyrate	1.13 ± 0.09^a ^b	0.98 ± 0.10^b ^c	0.86 ± 0.06^c	1.35 ± 0.03^a
Isobutyrate	0.10 ± 0.01^b	0.13 ± 0.01^a ^b	0.11 ± 0.01^a ^b	0.14 ± 0.01^a
Valerate	0.21 ± 0.03	0.24 ± 0.04	0.24 ± 0.05	0.28 ± 0.05
Isovalerate	0.17 ± 0.01^b	0.24 ± 0.03^a ^b	0.21 ± 0.03^a ^b	0.25 ± 0.03^a
Day 42
Acetate	2.23 ± 0.20^b	2.61 ± 0.13^a ^b	3.00 ± 0.12^a	2.79 ± 0.18^a
Propionate	1.09 ± 0.16	0.99 ± 0.06	1.27 ± 0.06	1.17 ± 0.13
Butyrate	0.87 ± 0.12	0.73 ± 0.11	0.92 ± 0.01	0.68 ± 0.03
Isobutyrate	0.13 ± 0.03	0.09 ± 0.00	0.08 ± 0.00	0.08 ± 0.00
Valerate	0.22 ± 0.07^a	0.10 ± 0.00^b	0.11 ± 0.00^b	0.13 ± 0.01^a ^b
Isovalerate	0.24 ± 0.07^a	0.14 ± 0.01^a ^b	0.12 ± 0.00^b	0.14 ± 0.01^a ^b

Values are expressed as means ± SE, n = 5.

^a,b,c

Mean values within the same row with different superscript letters were significantly different (P < 0.05). Control group, a basal diet; BS-A group, a basal diet supplemented with B. subtilis A at 1 × 10⁶ CFU/g feed; BS-B group, a basal diet supplemented with B. subtilis B at 1 × 10⁶ CFU/g feed; and BS-C group, a basal diet supplemented with B. subtilis C at 1 × 10⁶ CFU/g feed.