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Detection of immunoglobulin G to Pasteurella haemolytica capsular polysaccharide by enzyme-linked immunosorbent assay.

An enzyme-linked immunosorbent assay (ELISA) was developed for the detection of immunoglobulin G (IgG) to the capsular polysaccharide (CP) of Pasteurella haemolytica serotype 1. Purified CP was first covalently coupled to poly-L-lysine and then optimally adsorbed at a concentration of 5 micrograms/ml to microtiter plates in the presence of carbonate-bicarbonate buffer (pH 9.8). The ELISA was used to evaluate and compare the CP-specific IgG response of calves vaccinated with different P. haemolytica-derived experimental vaccines. Elevated levels of ELISA IgG titers were detected in postvaccination sera and lung lavage from calves vaccinated intradermally with live logarithmic-phase organisms or the culture supernatants. The ELISA was found to be a rapid, reproducible, and sensitive technique for the detection of CP-specific antibodies and may be useful to delineate the protective role of these antibodies in bovine pneumonic pasteurellosis.[1]

References

  1. Detection of immunoglobulin G to Pasteurella haemolytica capsular polysaccharide by enzyme-linked immunosorbent assay. Townsend, E.L., Maheswaran, S.K., Leininger, J.R., Ames, T.R. J. Clin. Microbiol. (1987) [Pubmed]
 
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