XYLB and hydrops fetalis: Compared to HF, HF+XY increased xylan 1,4-β-xylosidase, succinate-CoA ligase (ADP-forming), xylulose kinase, acetate-CoA ligase (ADP-forming), oligosaccharide reducing-end xylanase, phosphoketolase, and non-reducing end alpha-L-arabinofuranosidase predicted gene counts in the cecal mucosa (Q < 0.05).