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. 1972 May;5(5):775–782. doi: 10.1128/iai.5.5.775-782.1972

Contribution of Humoral and Cellular Factors to the Resistance to Experimental Infection by Pseudomonas aeruginosa in Mice II. Opsonic, Agglutinative, and Protective Capacities of Immunoglobulin G Anti-Pseudomonas Antibodies

Ann B Bjornson 1, J Gabriel Michael 1
PMCID: PMC422439  PMID: 4629252

Abstract

The opsonic, agglutinative, and mouse protective capacities of anti-Pseudomonas antibodies in immune and normal human immunoglobulin G (IgG) preparations were investigated. Opsonic activities of the immune IgG preparations correlated well with their protective activities. Antibodies present in normal IgG showed a substantial agglutinative activity but were poorly protective. Anti-Pseudomonas antibodies of both normal and immune IgG preparations were directed against the same serotype antigen as demonstrated by absorption experiments. Immune anti-Pseudomonas IgG antibodies fixed complement very efficiently as demonstrated by opsonophagocytic and hemolytic tests. Natural anti-Pseudomonas IgG antibodies fixed complement very poorly although they promoted phagocytic killing of bacteria only in the presence of heat-labile serum factors. It was concluded that, although agglutination can be used for qualitative measurement of antibacterial antibodies, it fails to measure their functional capacities.

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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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