The lipopolysaccharides of three strains of Haemophilus influenzae with varying beta-lactam susceptibility were examined. All three strains contained galactose, glucose, galactosamine, glucosamine, heptose, phosphate, and a trace of mannose. None contained fucose, rhamnose, or mannosamine. Levels of 2-keto-3-deoxy-octulosonic acid were consistently detected in all three strains at levels similar to that of Salmonella typhimurium LT2, but only following hydrolysis with 4 N hydrochloric acid.
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Parr et al. (1984) studied this question.
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