A mutation in the mip gene results in an attenuation of Legionella pneumophila virulence.

Abstract excerpt

Infection by Legionella pneumophila is believed to depend upon its ability to multiply within host alveolar macrophages. To investigate this, a site-specific mutation was introduced into a gene (mip) that encodes a 24,000-Da surface protein; an 80-fold loss of infectivity for both U937 cells and explanted human alveolar macrophages was observed. Further phenotypic analysis of the mutant strain has failed to show...

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