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Legionella pneumophila, the causative agent of Legionnaires' pneumonia, replicates within alveolar macrophages by preventing phagosome-lysosome fusion. Here, a large number of mutants called dot (defective for organelle trafficking) that were unable to replicate intracellularly because of an inability of the bacteria to alter the endocytic pathway of(More)
Legionella pneumophila is the cause of Legionnaires' pneumonia. After Internalization by macrophages, it bypasses the normal endocytic pathway and occupies a replicative phagosome bound by endoplasmic reticulum. Here, we show that lysis of macrophages and red blood cells by L. pneumophila was dependent on dotA and other loci known to be required for proper(More)
Legionella pneumophila replicates within a specialized phagosome in cultured cells, a function necessary for its pathogenicity. The replicative phagosome lacks membrane marker proteins, such as the glycoprotein LAMP-1, that are indicators of the normal endocytic pathway. We describe the isolation of several Legionella genes essential for intracellular(More)
Legionella pneumophila grows in human alveolar macrophages and resides within a phagosome that initially lacks proteins associated with the endocytic pathway. Required for targeting to this unique location is the Dot/Icm complex, which is highly similar to conjugative DNA transfer apparatuses. Here, we show that exposure to three distinct inducing(More)