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Infect Immun. 1979 June; 24(3): 837-842

Production of exoenzyme S during Pseudomonas aeruginosa infections of burned mice.

M J Bjorn, O R Pavlovskis, M R Thompson and B H Iglewski

ABSTRACT

Antisera which distinguished between Pseudomonas aeruginosa exoenzyme S and toxin A neutralized the adenosine diphosphate ribosyl transferase activity of the homologous, but not the heterologous, enzyme. Skin extracts and sera from burned mice infected with the exoenzyme S-producing strain P. aeruginosa 388 contained adenosine diphosphate ribosyl transferase activity that was not found in skin extracts or sera from uninfected mice. On the basis of immunological reactivity and enzymatic properties, the adenosine diphosphate ribosyl transferase activity present in skin extracts and sera from P. aeruginosa 388-infected mice was identified as exoenzyme S. Active elongation factor 2 levels in tissues from strain 388-infected mice were normal at 24 h postinfection, indicating that strain 388 does not produce detectable amounts of toxin A in vivo. An unexpected finding in this investigation was the presence of exoenzyme S-inactivating activity in the sera from some nonimmunized animals.

Infect Immun. 1979 June; 24(3): 837-842




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