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Failure of the Mycobacterium bovis BCG Vaccine: Some Species of Environmental Mycobacteria Block Multiplication of BCG and Induction of Protective Immunity to Tuberculosis

Open access
Brandt, Lise, Feino Cunha, Joana, Weinreich Olsen, Anja, Chilima, Ben, Hirsch, Penny, Appelberg, Rui, Andersen, Peter·2002·Infection and Immunity

Abstract

The efficacy of Mycobacterium bovis bacillus Calmette-Guérin (BCG) vaccine against pulmonary tuberculosis (TB) varies enormously in different populations. The prevailing hypothesis attributes this variation to interactions between the vaccine and mycobacteria common in the environment, but the precise mechanism has so far not been clarified. Our study demonstrates that prior exposure to live environmental mycobacteria can result in a broad immune response that is recalled rapidly after BCG vaccination and controls the multiplication of the vaccine. In these sensitized mice, BCG elicits only a transient immune response with a low frequency of mycobacterium-specific cells and no protective immunity against TB. In contrast, the efficacy of TB subunit vaccines was unaffected by prior exposure to environmental mycobacteria. Six different isolates from soil and sputum samples from Karonga district in Northern Malawi (a region in which BCG vaccination has no effect against pulmonary TB) were investigated in the mouse model, and two strains of the Mycobacterium avium complex were found to block BCG activity completely.

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Metadata

Authors
Brandt, L., Feino Cunha, J., Weinreich Olsen, A., Chilima, B., Hirsch, P., Appelberg, R., & Andersen, P.
Venue
Infection and Immunity
Published
2002-02
Volume
70
Issue
2
Pages
672-678
ISSN
  • 0019-9567 (ISSN-L)
  • 1098-5522
OpenAlex
W2097340122
Cited by
453
References
0
FWCI
20.25
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Failure of the Mycobacterium bovis BCG Vaccine: Some Species of Environmental Mycobacteria Block Multiplication of BCG and Induction of Protective Immunity to Tuberculosis. https://app.cochat.ai/papers/10.1128/iai.70.2.672-678.2002
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Brandt, L., Feino Cunha, J., Weinreich Olsen, A., Chilima, B., Hirsch, P., Appelberg, R., & Andersen, P. (2002). Failure of the Mycobacterium bovis BCG Vaccine: Some Species of Environmental Mycobacteria Block Multiplication of BCG and Induction of Protective Immunity to Tuberculosis. Infection and Immunity. https://doi.org/10.1128/iai.70.2.672-678.2002

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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