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Setting Up and Monitoring an Infection of Dictyostelium discoideum with Mycobacteria

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Mycobacterium marinum is the causative agent of fish and amphibian tuberculosis in the wild. It is a genetically close cousin of Mycobacterium tuberculosis , and thereby the infection process remarkably shares many of the hallmarks of M. tuberculosis infection in human, at both the cellular and organism levels. Therefore, M. marinum is used as a model for the study of mycobacterial infection in various host organisms. Recently, the Dictyostelium–M. marinum system has been shown to be a valuable model that recapitulates the main features of the intracellular fate of M. marinum including phagosome maturation arrest, as well as its particular cell-to-cell dissemination mode. We present here a “starter kit” of detailed methods that allows to establish an infection of Dictyostelium with M. marinum and to monitor quantitatively the intracellular bacterial growth.
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