Intracellular survival of Streptococcus pyogenes in polymorphonuclear cells results in increased bacterial virulence.

Abstract excerpt

It has recently been shown that survival within phagocytic cells constitutes an additional strategy used by Streptococcus pyogenes to evade the host defenses. Here we provide evidence that S. pyogenes can escape from the phagosome into the cytoplasm of phagocytic cells. Furthermore, intracellular bacteria seem to undergo phenotypic switching that results in much more virulent microorganisms.

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