Abstract
Previous studies in our laboratory have indicated that naturally resistant, inbred DBA/2J mice mount a greater serum antibody response to Pseudomonas aeruginosa 19660 than susceptible C57BL/6J mice. However, the specificity of the antibody produced was not known. The present study examines the specificity and kinetics of the humoral response of these mouse strains to potential virulence factors produced by the organism during both a primary and a secondary corneal infection administered 4 weeks after the primary infection. Serum antibody levels specific for lipopolysaccharide (LPS), exotoxin A, phospholipase C (PLC), alkaline protease, elastase, and flagella were measured by enzyme-linked immunosorbent assay. Little or no antibody to either alkaline protease or elastase was detected during either primary or secondary infection. Immunoglobulin G (IgG) antibodies specific to exotoxin A, PLC, and flagella were detected 2 weeks after primary infection, and a rapid response to these antigens was measured 1 week after secondary infection. During primary infection, detectable LPS-specific antibody was only IgM, while IgG appeared only after secondary infection. The kinetics of the humoral response in susceptible C57BL/6J mice were similar to those in resistant DBA/2J mice, although the magnitude of the response varied according to the antigen tested. These results indicate that LPS, exotoxin A, PLC, and flagella are present or produced in amounts that are immunogenic during corneal infection by P. aeruginosa 19660 in the mouse strains tested.
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Selected References
These references are in PubMed. This may not be the complete list of references from this article.
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