TABLE 1.

Phyla present across farms.

Phyla	Average relative abundance (%)a
Firmicutes	$59.74\pm {3.58}^{*}$
Bacteroidetes	$31.54\pm 3.99$
Spirochaetes	$2.554\pm 0.97$
Proteobacteria	$2.02\pm {0.94}^{*}$
Tenericutes	$1.77\pm {0.58}^{*}$
Actinobacteria	$1.56\pm {0.92}^{*}$
Verrucomicrobia	$0.24\pm {0.25}^{*}$
Cyanobacteria	$0.23\pm {0.28}^{*}$
Euryarchaeota	$0.21\pm {0.13}^{*}$
Fibrobacteres	$0.08\pm {0.12}^{*}$
Lentisphaerae	$0.02\pm {0.04}^{*}$
Planctomycetes	$0.02\pm 0.03$
Elusimicrobia	$0.01\pm 0.03$

^a± standard deviation of phyla present in filtered data.

^*Housing type significantly affected average transformed relative abundance of phyla as determined by Kruskal–Wallis rank sum test (p ≤ 0.01).