Table 3.

Suckling mouse assay with Providencia alcalifaciens

Sample	Diarrhea score (no. of positive animals/total no. of animals)a
E. coli C600	0 (0/12)
P. alcalifaciens AH-31	58 (7/12)
P. alcalifaciens AS-1	0 (0/12)
rCTb	100 (9/9)

^aThe animals excreting stained loose and/or watery feces over 24 h after sample administration were judged positive.

^bRecombinant cholera toxin.