Different strains of Mycobacterium tuberculosis cause various spectrums of disease in the rabbit model of tuberculosis

Yukari C Manabe, Arthur M. Dannenberg, Sandeep K. Tyagi, Christine L. Hatem, Mark Yoder, Samuel C. Woolwine, Bernard C. Zook, M. Louise M Pitt, William Ramses Bishai

Research output: Contribution to journalArticle

Abstract

The rabbit model of tuberculosis has been used historically to differentiate between Mycobacterium tuberculosis and Mycobacterium bovis based on their relative virulence in this animal host. M. tuberculosis infection in market rabbits is cleared over time, whereas infection with M. bovis results in chronic, progressive, cavitary disease leading to death. Because of the innate resistance of commercial rabbits to M. tuberculosis, 320 to 1,890 log-phase, actively growing inhaled bacilli were required to form one grossly visible pulmonary tubercle at 5 weeks. The range of inhaled doses required to make one tubercle allows us to determine the relative pathogenicities of different strains. Fewer inhaled organisms of the M. tuberculosis Erdman strain were required than of M. tuberculosis H37Rv to produce a visible lesion at 5 weeks. Furthermore, with the Erdman strain, only 7 of 15 rabbits had healed lesions at 16 to 18 weeks; among the other animals, two had chronic, progressive cavitary disease, a phenotype usually seen only with M. bovis infection. Genotypic investigation of the Erdman strain with an H37Rv-based microarray identified gene differences in the RD6 region. Southern blot and PCR structural genetic analysis showed significant differences between M. tuberculosis strains in this region. Correlation of the relative pathogenicity, including disease severity, in the rabbit model with the strain genotype may help identify stage-specific M. tuberculosis genes important in human disease.

Original languageEnglish (US)
Pages (from-to)6004-6011
Number of pages8
JournalInfection and Immunity
Volume71
Issue number10
DOIs
StatePublished - Oct 1 2003

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Mycobacterium tuberculosis
Tuberculosis
Rabbits
Mycobacterium bovis
Virulence
Mycobacterium Infections
Southern Blotting
Bacillus
Genes
Genotype
Phenotype
Polymerase Chain Reaction
Lung
Infection

ASJC Scopus subject areas

  • Immunology

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Different strains of Mycobacterium tuberculosis cause various spectrums of disease in the rabbit model of tuberculosis. / Manabe, Yukari C; Dannenberg, Arthur M.; Tyagi, Sandeep K.; Hatem, Christine L.; Yoder, Mark; Woolwine, Samuel C.; Zook, Bernard C.; Pitt, M. Louise M; Bishai, William Ramses.

In: Infection and Immunity, Vol. 71, No. 10, 01.10.2003, p. 6004-6011.

Research output: Contribution to journalArticle

Manabe, Yukari C ; Dannenberg, Arthur M. ; Tyagi, Sandeep K. ; Hatem, Christine L. ; Yoder, Mark ; Woolwine, Samuel C. ; Zook, Bernard C. ; Pitt, M. Louise M ; Bishai, William Ramses. / Different strains of Mycobacterium tuberculosis cause various spectrums of disease in the rabbit model of tuberculosis. In: Infection and Immunity. 2003 ; Vol. 71, No. 10. pp. 6004-6011.
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