Cellular monosaccharide patterns of Neisseriaceae

Area of Science:

• Microbiology
• Bacterial Taxonomy
• Analytical Chemistry

Background:

• Accurate bacterial classification and identification are crucial in microbiology.
• Cellular monosaccharide composition can reflect phylogenetic relationships.
• Previous methods for bacterial characterization have limitations.

Purpose of the Study:

• To investigate the utility of cellular monosaccharide profiles for classifying and identifying Neisseria, Moraxella, and Acinetobacter species.
• To determine if monosaccharide composition can differentiate between bacterial species and subspecies.

Main Methods:

• Screening of 64 bacterial strains (Neisseria, Moraxella, Acinetobacter) for cellular monosaccharides.
• Utilizing gas-liquid chromatography and other chromatographic techniques.
• Analyzing the presence and absence of specific sugars like ribose, glucose, glucosamine, KDO, heptose, mannose, and sialic acid.

Main Results:

• All strains contained ribose, glucose, glucosamine, and 2-keto-3-deoxyoctonate (KDO).
• Heptose was found exclusively in "true neisseriae" and Moraxella urethralis.
• Mannose characterized N. ovis and M. atlantae; sialic acid differentiated N. meningitidis serogroups and was present in some M. nonliquefaciens strains.
• Acinetobacter strains exhibited significant heterogeneity in monosaccharide patterns.

Conclusions:

• Gas chromatographic monosaccharide profiling of whole cells or extracted carbohydrates is applicable for bacterial classification and identification.
• This method allows for differentiation at the subspecies level.
• Monosaccharide profiles can be valuable for monitoring cellular polysaccharide purification.