Lipopolysaccharide from Burkholderia vietnamiensis strain LMG 6999 contains two polymers identical to those present in the reference strain for Burkholderia cepacia serogroup O4

Lipopolysaccharide was isolated from strain LMG 6999 of Burkholderia vietnamiensis. Degradative and NMR spectroscopic studies established the presence of two polymeric fractions based on the following trisaccharide repeating units: I: →3)-α-d-Galp-(1→3)-β-d-Galp-(1→3)-β-d-GalpNAc-(1→; II: →3)-α-d-GalpNAc-(1→3)-β-d-GalpNAc-(1→4)-α-l-Rhap-(1→.The same polymers have previously been found together in lipopolysaccharide from the reference strain for Burkholderia cepacia serogroup O4 and, individually, in those from B. cepacia serogroups C (I) and A (II).