Table 3.

Relative abundance (%) of sow fecal bacteria at day 110 of gestation^a

Taxon	Abundance (%) in feces of sows fed:b		P value	No. of animalsc
	Non-GM diet	GM diet		Non-GM diet	GM diet
Phylum
Verrucomicrobia#	0 (0–0.4)	0 (0)	0.04	4	0
Family
Rikenellaceae†	5.9 (1.7–11.9)	3.6 (1.9–6.5)	0.05	11	12
Prevotellaceae†	2.4 (1.3–4.4)	1.5 (0.7–2.9)	0.01	11	12
Succinivibrionaceae#	1.9 (0–14.8)	0.5 (0–2.3)	0.01	10	10
Rikenellaceae-related bacteria†	1.6 (0–4.7)	0.6 (0.2–1.2)	0.04	10	12
Lactobacillaceae#	0.2 (0–1.0)	0 (0–0.4)	0.03	9	3
Genus
Prevotella†	2.4 (1.3–4.4)	1.5 (0.7–2.9)	0.01	11	12
Lachnospiraceae incertae sedis#	1.3 (0.5–2.8)	0.8 (0.6–1.5)	0.01	11	12
Anaerobiospirillum#	1.8 (0–14.3)	0.5 (0–2.3)	0.01	10	10
Lactobacillus#	0.2 (0–1.0)	0 (0–0.4)	0.03	9	3

^aData are presented as treatment means (95% confidence intervals are given in parentheses) for data analyzed using parametric tests (†) or medians (with 5th to 95th percentiles) for data analyzed using nonparametric tests (#). The main phyla are shown in Fig. 1, and a full outline of the relative abundance of all bacterial taxa detected in sow feces is available in Table S4 in the supplemental material.

^bSows were fed a non-GM or a GM maize-based diet during gestation and lactation.

^cNumber of animals in which the bacterial taxon was present (total of 11 and 12 sows on the non-GM and GM treatments, respectively).