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Predator or prey?Chlamydophila abortusinfections of a free-living amoebae,Acanthamoeba castellani9GU

Authors
Journal
Microbes and Infection
1286-4579
Publisher
Elsevier
Publication Date
Volume
10
Issue
6
Identifiers
DOI: 10.1016/j.micinf.2008.01.006
Keywords
  • Chlamydophila Abortus
  • Chlamydia
  • Parachlamydia Acanthamoebae
  • Acanthamoeba Castellani
  • Endosymbiont
  • Free-Living Amoebae
Disciplines
  • Biology

Abstract

Abstract Limited evidence exists to suggest that the ability to invade and escape protozoan host cell bactericidal activity extends to members of the Chlamydiaceae, intracellular pathogens of humans and animals and evolutionary descendants of amoeba-resisting Chlamydia-like organisms. PCR and microscopic analyses of Chlamydophila abortus infections of Acanthamoeba castellani revealed uptake of this chlamydial pathogen but, unlike the well-described inhabitant of A. castellani, Parachlamydia acanthamoebae, Cp. abortus did not appear to propagate and is likely digested by its amoebal host. These data raise doubts about the ability of free-living amoebae to serve as hosts and vectors of pathogenic members of the Chlamydiaceae but reveal opportunities, via comparative genomics, to understand virulence mechanisms used by Chlamydia-like organisms to avoid amoebal digestion.

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