In addition, this mechanism of chemotaxis is likely utilized by the opportunistic pathogen B. multivorans, where FabG (which oxidizes l-fucose, d-arabinose, and l-galactose) may play an important role in lung colonization of cystic fibrosis patients who produce excessive amounts of mucus comprising at least two of these monosaccharides (22). This evidence concerns the gene HSD17B8 and cystic fibrosis.