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. 1994 Sep;1(5):608–611. doi: 10.1128/cdli.1.5.608-611.1994

Immunoblot analysis of humoral immune responses to Mycobacterium bovis in experimentally infected cattle: early recognition of a 26-kilodalton antigen.

C J O'Loan 1, J M Pollock 1, J Hanna 1, S D Neill 1
PMCID: PMC368349  PMID: 8556509

Abstract

Development of a serodiagnostic test for bovine tuberculosis necessitates an understanding of the humoral immune responses of animals following infection with Mycobacterium bovis. The antibody responses in groups of calves challenged intranasally with different doses of M. bovis (approximately 10(2), 10(4), and 10(6) CFU) or placed in contact with the infected animals were analyzed by immunoelectrophoretic blotting in which a whole-cell sonicate of M. bovis was utilized as an antigen. Antibody responses were evident early in infections in which calves were exposed to high doses of M. bovis, while in groups exposed to lower doses, the time until antibody was detected increased as the challenge dose decreased. In cattle exposed to M. bovis, immunoblot analysis showed antibody responses to three main antigens of 26, 22, and 16 kDa. It was further demonstrated that antibody responses to the 26-kDa antigen appeared earliest in the course of infection. Preliminary investigations in this study have identified a 26-kDa antigen for potential use in improved serodiagnosis by enzyme-linked immunosorbent assays.

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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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