Table 1.

The detective results of B.h in fresh feces (n, %)

Group	n	B.h positive
		n	rate
bNormal	300	2	0.67
Infants	100	1	1.00
Pupils	100	1	1.00
Middle school students	100	0	0.00
bDiarrheic outpatients	403	24	5.96
aMild	232	14	6.03
aIntermediate	89	2	2.25
aSevere	17	0	0.00
aObstinate	65	8	12.31

^aP < 0.05, χ² = 7.9475;

^bP < 0.01, χ² = 13.5181 vs: comparison with normal and abnormal and different diarrhea