highly significantP > 0.05
ETEC Exposure and Fecal Microbiota Composition Although there was an indication that a decrease in richness occurred more rapidly in ETEC-exposed pigs in comparison with the control pigs (RM-ANOVA: P = 0.05), the highly significant decrease in richness and diversity over time was not affected overall by ETEC exposure (RM-ANOVA: P > 0.05; Table 2 ).