Table 3.

Gut microbiota in obese and normal-weight young subjects ^a

	Normal weight (log10 cell/g of fecal)	Obese (log10 cell/g of fecal)	p value
Total bacteria	11.0 (10.6–11.2)	10.7 (10.4–11.0)	0.046*
Gram-positive
C. leptum	8.2 (7.5–8.3)	8.9 (8.3–8.9)	<0.001*
Lactobacillus	6.4 (6.2–6.4)	6.9 (6.6–6.9)	<0.001*
Bifidobacterium	7.1 (6.1–7.9)	6.8 (5.9–7.8)	0.527
Gram-negative
B. fragilis	9.2 (8.5–9.6)	8.7 (7.0–9.8)	0.148
Prevotella	9.0 (7.2–9.4)	7.6 (6.1–7.6)	<0.001*
E. coli	9.7 (8.8–10.1)	8.5 (7.7–9.0)	<0.001*

^aMedian (25th and 75th percentile) Mann-Whitney U test.

^*Statistical difference (p < 0.050).