... weakeneddefense mechanisms often as a result of thermal burns,surgical operations, or another predisposing disease, such ascystic fibrosis and cancer [1,2]. Lipopolysaccharide (LPS) isthe major surface ... phosphorylation but data on thelocation of the phosphate groups are contradictory [5–7].The outer core region contains up to fourD-glucoseresidues, oneL-rhamnose residue, and one residue ... polymerization. In several P. aeruginosastrains, the O-polysaccharide is structurally heterogeneous,most likely, as a result of postpolymerization nonstoichio-metric modifications, such as O-acetylation,...