Table 3.

Evaluation of acute dextran sulphate sodium (DSS)-induced colitis in conventional BALB/c mice, after transfer of serum from mice treated orally with membranous fraction of Parabacteroides distasonis (mPd) or phosphate-buffered saline (PBS).

Experimental group	Colon length (cm)	Disease activity index	Histological grade
Serum from PBS-treated	6·10 ± 0·58	2·67 ± 1·08	1·45 ± 0·36
Serum from mPd-treated	7·82 ± 0·15**	0·40 ± 0·37**	0·35 ± 0·06*

Data are representative of one experiment. Similar results were obtained from three independent experiments. Values are expressed as means ± standard deviations (five mice per group). An unpaired Student's t-test was used to calculate the significance of differences between the mPd-treated group and the PBS-treated group (

^*P < 0·05;

^**P < 0·01).