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. 2019 Jan 17;9:1968. doi: 10.3389/fphys.2018.01968

Table 5.

The effect of different Bacillus spp. on OTUs of gut microbiota of broiler chickens on days 21 and 421.

Items Control Bacillus coagulans TBC169 Bacillus.Subtilis PB62 Bacillus subtilis DSM32315 p-value
Day 21
Phylum     456 ± 103a   383 ± 44a   777 ± 15c   871 ± 62c 0.001
Class     456 ± 102a   384 ± 44a   773 ± 16c   866 ± 62c 0.001
Order   428 ± 80a   374 ± 40a   738 ± 16c   816 ± 62c 0.000
Family   334 ± 41a   324 ± 27a   557 ± 20c   604 ± 47c 0.000
Genus   203 ± 13a   212 ± 10a  305 ± 7c   317 ± 24c 0.000
Species 51 ± 6 57 ± 5 52 ± 2 55 ± 4 0.804
Unclassified   50 ± 7a   21 ± 5c     15 ± 3cd     6 ± 1d 0.000
Day 42
Phylum 2171 ± 55a   1771 ± 263ab       1321 ± 365bcd     636 ± 123d 0.004
Class 2138 ± 54a   1748 ± 259ab       1308 ± 359bcd     633 ± 122d 0.004
Order 1911 ± 41a   1580 ± 229ab       1202 ± 319bcd     586 ± 107d 0.004
Family 1285 ± 19a   1078 ± 145ab         788 ± 180bcd     439 ± 69d 0.002
Genus 582 ± 7a   506 ± 59ab        387 ± 76bcd     242 ± 25d 0.002
Species 86 ± 2a   77 ± 10a        65 ± 12ac       39 ± 5c 0.010
Unclassified       7 ± 0.3a       8 ± 0.4a      4 ± 1c            4 ± 0.5c 0.001

a,b,c,dMeans within a row with no common superscripts differ significantly (P < 0.05). 1n = 4 replicates per treatment. 2n = 3 replicates per treatment on day 21.