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. 1985 Nov;50(2):555–559. doi: 10.1128/iai.50.2.555-559.1985

Mycobacterium bovis BCG vaccine fails to protect protein-deficient guinea pigs against respiratory challenge with virulent Mycobacterium tuberculosis.

D N McMurray, M A Carlomagno, C L Mintzer, C L Tetzlaff
PMCID: PMC261991  PMID: 3932212

Abstract

Specific-pathogen-free Hartley guinea pigs were maintained on isocaloric-purified diets either adequate (30%) or moderately deficient (10%) in protein. Half of each diet group was vaccinated with viable Mycobacterium bovis BCG. Six weeks later, all animals were challenged by the respiratory route with virulent Mycobacterium tuberculosis H37Rv. At intervals of 1, 2, and 3 weeks postchallenge, guinea pigs from each diet and vaccination group were skin tested with tuberculin and sacrificed. Protein deficiency resulted in loss of tuberculin hypersensitivity. Vaccination with M. bovis BCG protected control animals, as determined by significant reductions in the number of M. tuberculosis H37Rv organisms recovered from lungs, spleen, and bronchotracheal lymph nodes 2 and 3 weeks postchallenge. Based upon the same criteria, the degree of protection afforded protein-deficient animals by M. bovis BCG vaccine ranged from partial (spleen and lymph nodes) to none at all (lungs). Approximately the same numbers of tubercle bacilli were recovered from nonvaccinated guinea pigs in both diet groups. Protein deficiency appears to impair M. bovis BCG-induced immunity while not affecting primary pulmonary infection with virulent M. tuberculosis.

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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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