Influence of C-variant proportions on the survival of EcO157 strains before or after exposure to protozoa and in soil from a spinach field.

aSpearman rank-order correlations.
bFate of EcO157 in soil compared with 9 strains of different proportions of C (see Table 3 for proportion of C variants prior to exposure to soil).
c*  =  P<0.05, **  =  P<0.01, ***  =  P<0.001, ****  =  P<0.0001 and NS  =  not significant.