[Protective cross activity of the extracellular mucus of Pseudomonas aeruginosa].
Extracellular slime was isolated from 15 P. aeruginosa typing strains of different O-serotypes (immunotypes). The isolated slime, partially purified by ethanol precipitation, was later referred to as crude slime. Glycolipoprotein was obtained from crude slime and lipopolysaccharide (LPS) was obtained from acetone-dried microbial cells by the method of aqueous-phenol extraction. All these antigenic preparations were studied in the active mouse cross-protection tests: immunized mice were challenged with 7 strains of different immunotypes, strain No. 170 019 or toxigenic strain PA-103. In experiments on mice the slime of different P. aeruginosa serotypes (immunotypes) was found to stimulate immunity to intraperitoneal infection with P. aeruginosa, both homologous or heterologous in respect to their immunotype, including toxigenic strains. Slime glycoprotein also stimulated active cross-immunity in mice, but the level of this immunity was higher than that of immunity stimulated by crude slime. LPS showed mostly weak protective activity in experiments on mice.
D000818:Animals; D000942:Antigens, Bacterial / Q000276:immunology*; D002473:Cell Wall / Q000276:immunology / Q000378:metabolism; D003429:Cross Reactions; D007114:Immunization; D008070:Lipopolysaccharides / Q000276:immunology*; D051379:Mice; D009093:Mucus / Q000276:immunology*; D011550:Pseudomonas aeruginosa / Q000276:immunology*
D000942:Antigens, Bacterial; D008070:Lipopolysaccharides
Perekrestnaia protektivnaia aktivnost' vnekletochnoĭ slizi Pseudomonas aeruginosa.