Bar graph illustrating the mean Chao1 index for superficial (S) and deep (D) strata samples of healthy skin, active digital dermatitis lesions, and inactive digital dermatitis lesions.

<p>Error bars represent standard errors. One asterisk means a significant difference (*<i>P</i> < 0.01) between healthy skin and lesion types. Two asterisks mean a significant interaction (**<i>P</i> < 0.01) for sample and lesion types. Different letters (a, b) indicate significant differences between different strata within a sample type.