In OEP (common protective antigen of
Pseudomonas aeruginosa) immunized mice, OEP-HA (hemagglutination) titer was decreased by intraperitoneal inoculation of
P. aeruginosa, especially Fisher's serotype 2 and NC 5 strain. All of OEP immunized mice survived from the challenges by Fisher's seven serotypes strains. Otherwise all of non-immunized mice died within 48 hours by seven serotypes challenges.
In vitro system, the enhancing effects of the phagocytosis of mice spleen macrophages by anti-OEP-antibody were common to all of Fisher's seven serotype, and the decreasing tendancy of OEP-HA titer in these supernatants was observed.
The OEP-HA titer and Formalized bacterial agglutination titer were measured in various γ-globulin products before and after the absorption by OEP antigen. Only in Fisher's serotype 2 and NC 5 strains their titer was decreased.
By injection of γ-globulin products to mice, serum γ-globulin concentration and OEP-HA titer were increased a little, but their therapeutic effectiveness to
P. aeruginosa infection was reavealed in our previous reports.
When γ-globulin products were absorbed with OEP antigen, their therapeutic effects were depressed.
In conclution, anti-OEP-antibody has therapeutic effect to the all of Fisher's serotypes of
P. aeruginosa infection and the hig h level of antibody in bloo d is not always needed fo r the immunotherapy.
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