Differences in diarrhea incidence between the
3 treatments were tested by the chi-square contingency test. All other
data were analyzed by using SAS version 9.1. The results are presented as
means6 SEMs. One-factor ANOVA followed by Tukeys multiple-range
tests were used for equal variances. Kruskal-Wallis 1-factor ANOVAwas
performed to compare means with unequal variances. For all statistical
analyses, P values