Table 3.

Relative abundance of significantly different taxa in the fecal bacterial microbiota of foals with (n = 4 at T1, n = 6 at T2) and without (n = 11) diarrhea

	Age group	Median relative abundance % (CI %)		p-value	FDR adjusted p-value
		Healthy	Diarrhea
Phylum
Chlamydiae	T2	0.2 (0.01–0.9)	<0.001(0- < 0.001)	0.02	0.08
Class
Chlamydiae	T2	0.2 (0.01–0.9)	<0.001(0- < 0.001)	0.02	0.11
Verrucomicrobia Subdivision 5	T2	3.2 (1.4–4.1)	0.05 (<0.011–0.3)	0.004	0.06
Order
Chlamydiales	T2	0.2 (0.01–0.9)	<0.001(0- < 0.001)	0.02	0.14
Unclassified Verrucomicrobial Subdivison 5	T2	3.2 (1.4–4.1)	0.05 (<0.011–0.3)	0.004	0.08
Family
Ruminococcaceae	T1	18.2 (0.6–8.5)	1.8 (4.5–23.3)	0.04	1
Clostridiaceae	T2	0.7 (0.3–3)	0.2 0.1–0.4)	0.04	0.35

FDR: False discovery rate adjusted (Benjamin Hochberg procedure)

T1: 1–14 days of age, T2: 15–28 days of age