Abstract
The identity of the structures of common polysaccharide antigen (CPA) of Pseudomonas aeruginosa and O-antigen of Pseudomonas cerasi was used for immunochemical study of polysaccharide antigens of seven immunotypes (IT) of P. aeruginosa. ELISA performed with O-antiserum to P. cerasi showed that CPA is present in all seven ITs in different amounts. In SDS-PAGE this antigen behaves as a lipopolysaccharide (LPS) and is detected by immunoblotting technique in five of seven ITs.
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