title: Molecular immunological heterogeneity of the Salmonella zuerich [1, 9, 12, (46), 27] cell-wall polysaccharides.
abstract: Extraction of O specific polysaccharide from S. zuerich leads to three fractions (ZA, ZB, ZC). Polysaccharide ZB carries specificities 1, 27, and 46, present on the Salmonella cells. It exhibits a factor 27 that is very similar to that present on the S. typhi T2 1-minus 27-+ polysaccharide, a factor 1 that is close to that present on S. senftenberg polysaccharide, and a factor 46 that gives a very weak cross-reaction with anti-46 antibodies. Polysaccharides ZA and ZB are immunologically different and ZB contains two distinct fractions: ZB 1-minus devoid of Ofactor 1 and carrying the specificities 46 and 27 mostly, of not completely, on the same molecule (46, 27); and ZB1-+ carrying O factors 1, (46), 27. ZB 1-+ is composed of at least two different molecules: [1,(46)] precipitable with anti-1 antibodies but only coprecipitable with anti-46 antibodies; and (1, 27) precipitable with both anti-1 and anti-27 antibodies. Molecules [1, (46)] precipitate only part of the anti-1 antibodies precipitable by (1, 27). The smaller precipitation of anti-27 antibodies (when factor 27 is present together with factor 1 on the same molecule) and the coprecipitation, instead of precipitation, of anti-46 antibodies (when factors 46 and 1 are present on the same molecule) may be explained by a sterical hindrance between O-factors 1 and 27, and 1 and 46. The molecular, immunological heterogeneity of the polysaccharides extracted from S. zuerich would result from the presence on the cells of two kinds of O polysaccharides: one with, the other without O factor1, which is related to the presence of a side-chain of an alpha-D-glucosyl residue. A structure for S. zuerich polysaccharide is proposed.
mesh_terms: D000017:ABO Blood-Group System; D000818:Animals; D002241:Carbohydrates / Q000032:analysis; D003429:Cross Reactions; D006801:Humans; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D011135:Polysaccharides, Bacterial / Q000276:immunology*; D011233:Precipitin Tests; D011817:Rabbits / Q000276:immunology; D012475:Salmonella / Q000276:immunology*; D012482:Salmonella paratyphi A / Q000276:immunology; D012486:Salmonella typhimurium / Q000276:immunology; D013045:Species Specificity
chemical_list: D000017:ABO Blood-Group System; D002241:Carbohydrates; D011135:Polysaccharides, Bacterial