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Is Acanthamoeba pathogenicity associated with intracellular bacteria?

Graeme Neil Paterson1, Michael Rittig, Ruqaiyyah Siddiqui

  • 1School of Biomedical Sciences, University of Nottingham, England, UK.

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Summary

This study investigated Acanthamoeba virulence, finding no evidence of intracellular microbial endosymbionts in a clinical isolate. Therefore, Acanthamoeba pathogenicity may not solely depend on endosymbiont virulence.

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Area of Science:

  • Microbiology
  • Pathogen Research
  • Acanthamoeba

Background:

  • Acanthamoeba is a potential evolutionary precursor for microbial pathogen development.
  • Intracellular bacteria or microbial endosymbionts are hypothesized to increase Acanthamoeba pathogenicity.

Purpose of the Study:

  • To investigate the presence of intracellular microbial endosymbionts in a clinical Acanthamoeba isolate.
  • To assess the contribution of endosymbionts to Acanthamoeba virulence.

Main Methods:

  • Transmission electron microscopy (TEM) was employed to visualize intracellular structures.
  • Polymerase chain reaction (PCR) was used to detect microbial DNA.
  • Simple culturing techniques were utilized to identify viable microorganisms.

Main Results:

  • No apparent evidence of intracellular microbial presence was detected in the clinical Acanthamoeba isolate.
  • Microscopy, PCR, and culturing failed to confirm endosymbiont colonization.

Conclusions:

  • The virulence of this Acanthamoeba clinical isolate may not be solely attributed to the pathogenicity of endosymbionts.
  • Further research is needed to understand the factors contributing to Acanthamoeba virulence.