Clustering of chicken BAL fluid samples according to age.

<p>PCOA graph showing the significantly separate clustering by community composition of the bacterial communities in BAL fluid from chickens of different ages (AMOVA: P = 0.017). Prior to clustering, OTUs identified as <i>Pseudomonas</i> were removed as their presence was likely due to contamination from reagents. Each axis label shows the total percentage of variability between samples which is represented by that axis.</p>