Fig. 2From: Piglet nasal microbiota at weaning may influence the development of Glässer’s disease during the rearing periodAlpha diversity on rarefied samples analyzed by health status. Species richness of nasal samples from farms with Glässer’s disease (GD) and control farms with no respiratory condition (C); dotted lines represent the standard deviation (a). Alpha diversity was compared between groups by measuring different metrics: PD_Whole Tree (b), Shannon-Wiener’s (c), and Chao1 (d). Outliers are indicated with plus signs on the plot. * denotes P ≤ 0.05. Results from individual farms are presented in Additional file 2 Back to article page