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. 1980 Jun;28(3):860–866. doi: 10.1128/iai.28.3.860-866.1980

Effect of Mycobacterium bovis BCG vaccination upon Mycobacterium lepraemurium infection.

M J Lefford, R Morgan, P S Logie
PMCID: PMC551030  PMID: 6995324

Abstract

Mice were infected with 10(8) Mycobacterium lepraemurium in the footpad (unsuppressed mice), and some of these animals were concurrently given 10(9) heat-killed M. lepraemurium intravenously (suppressed mice). These groups of mice were preimmunized with 10(7) viable organisms of Mycobacterium bovis BCG by several routes. BCG inhibited the proliferation of M. lepraemurium in the unsuppressed mice, but not in the suppressed mice. In effect, the intravenous administration of heat-killed M. lepraemurium suppressed the immunity to M. lepraemurium that BCG vaccination had engendered. BCG did not protect normal mice against intravenous infection with M. lepraemurium. It appears that normal mice against intravenous infection with M. lepraemurium. It appears that the inhibitory effect of BCG vaccination upon M. lepraemurium infection is due to cross-reactive immunity rather than to nonspecific immunity or immunopotentiation. Thus, the route of BCG vaccination was immaterial, and vaccination 12 weeks before M. lepraemurium infection was as beneficial as vaccination 4 weeks before infection. Moreover, spleen cells from M. lepraemurium-immunized mice conferred adoptive immunity to BCG. The implications of this study for the use of BCG as a prophylactic and therapeutic agent in human leprosy are discussed.

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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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