Jan 1, 1976

Characteristics of lipopolysaccharides of Salmonella typhi isolated from carriers and patients suffering from typhoid fever

Folia Microbiologica
T Strýĉková, G Farbakyová

Abstract

Lipopolysaccharides (LPS) of Salmonella typhi strains, isolated from carriers and patients suffering from typhoid fever, were characterised according to their biochemical properties, morphological structure and degree of aggregation of complexes. All preparations of LPS, regardless of their origin, were morphologically heterogeneous. Free electrophoresis and immunoelectrophoresis demonstrated that LPS preparations were composed of components possessing different mobilities in electric fields. LPS of bacterial strains isolated from both carriers and patients, split upon reaction in immunoelectrophoresis with specific antiserum 73, rabbit antiserum to Salmonella typhi Vi Bhatnagar and 0-901 split into anodic and cathodic fractions. The anodic fraction reacted similarly as Vi antigen. LPS from Salmonella typhi Ty-2 yielded only the cathodic fraction, typical for O antigen. LPS from strains which were passaged twice in nutritional medium possessed identical properties as LPS from fresh cultures of Salmonella typhi. Electron microscopy revealed that LPS appears as long bands, rods, ellipsoid forms and amorphous material. Contrary to amorphous material, the bands, rods and ellipsoid forms possessed three-layer structure.

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Citations

Mentioned in this Paper

Immunoelectrophoresis
Salmonella typhi
Deoxycholic Acid, Monoammonium Salt
Complex (molecular entity)
Aggregation
Immune Sera
Polysaccharides, Bacterial
Electron Microscopy, Diagnostic
Antigens, Bacterial
Antigens

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