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Updated: Aug 19, 2026
Protective Efficacy and Pulmonary Immune Response Following Subcutaneous and Intranasal BCG Administration in Mice
Published on: September 19, 2016
Mice fed lipid-encapsulated Mycobacterium bovis BCG are protected against aerosol challenge with Mycobacterium
Frank E Aldwell1, Lise Brandt, Clare Fitzpatrick
1Department of Microbiology and Immunology, University of Otago, P.O. Box 56, Dunedin, New Zealand. frank.aldwell@stonebow.otago.ac.nz.
Abstract:
Mice that consumed a single dose of 10(7) lipid-encapsulated Mycobacterium bovis BCG bacilli showed significant pulmonary and systemic protection against aerosol challenge with M. tuberculosis H37Rv. As an extension of previous challenge studies with virulent strains of M. bovis, this report describes a reduction in M. tuberculosis infection in mice vaccinated orally with lipid-encapsulated BCG comparable to that observed in mice vaccinated subcutaneously with BCG. These results are consistent with the induction of tuberculin-specific cell-mediated immune responses.
