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Immunological nonidentity of Pseudomonas paucimobilis with Pseudomonas aeruginosa and Pseudomonas cepacia.

ABSTRACT

This investigation determined the serum agglutination activity and serum bactericidal response after rabbit immunization with Pseudomonas paucimobilis. Agglutination activity of antisera showed a twofold increase in titer from before immunization to 4 weeks post-immunization and peaked at 8 weeks post-immunization with a titer of 1:512. 2-Mercaptoethanol reduction of immunoglobulin M decreased agglutination titers. No major antigens were found to be common from crude antigen preparations of P. paucimobilis, Pseudomonas aeruginosa and Pseudomonas cepacia when tested with antisera to P. paucimobilis. Serum bactericidal activity was found in post-immunization antisera at 8 and 12 weeks against P. paucimobilis, with no activity present before immunization or at 4 weeks post-immunization. Antisera against P. paucimobilis showed no bactericidal activity against P. aeruginosa or P. cepacia.