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• W2124804703 abstract "ABSTRACT The rabbit model of tuberculosis is attractive because of its pathophysiologic resemblance to the disease in humans. Rabbits are naturally resistant to infection but may manifest cavitary lung lesions. We describe here a novel approach that utilizes presensitization and bronchoscopic inoculation to reliably produce cavities in the rabbit model. With a fixed inoculum of bacilli, we were able to reproducibly generate cavities by using Mycobacterium bovis Ravenel, M. bovis AF2122, M. bovis BCG, M. tuberculosis H37Rv, M. tuberculosis CDC1551, and the M. tuberculosis CDC1551 Δ sig C mutant. M. bovis infections generated cavitary CFU counts of 10 6 to 10 9 bacilli, while non- M. bovis species and BCG yielded CFU counts that ranged from 10 4 to 10 8 bacilli. Extrapulmonary dissemination was almost exclusively noted among rabbits infected with M. bovis Ravenel and AF2122. Though all of the species yielded secondary lesions at intrapulmonary sites, M. bovis infections led to the most apparent gross pathology. Using the M. tuberculosis icl and dosR gene expression patterns as molecular sentinels, we demonstrated that both the cavity wall and cavity lumen are microenvironments associated with hypoxia, upregulation of the bacterial dormancy program, and the use of host lipids for bacterial catabolism. This unique cavitary model provides a reliable animal model to study cavity pathogenesis and extrapulmonary dissemination." @default.
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• W2124804703 date "2009-02-01" @default.
• W2124804703 modified "2023-10-03" @default.
• W2124804703 title "Extrapulmonary Dissemination of <i>Mycobacterium bovis</i> but Not <i>Mycobacterium tuberculosis</i> in a Bronchoscopic Rabbit Model of Cavitary Tuberculosis" @default.
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• W2124804703 doi "https://doi.org/10.1128/iai.01132-08" @default.
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