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Interaction between Vibrio mimicus and Acanthamoeba castellanii.
Environmental Microbiology Reports
|May 11, 2010
Summary
Acanthamoeba castellanii hosts Vibrio mimicus, enhancing its survival and enabling intracellular growth within amoeba. Cysts of Acanthamoeba castellanii protect Vibrio mimicus from antibiotics, suggesting a potential environmental reservoir role.
Area of Science:
- Microbiology
- Environmental Science
- Parasitology
Background:
- Vibrio mimicus, a Gram-negative bacterium causing gastroenteritis, has an undefined environmental reservoir.
- Both Acanthamoeba species and Vibrio species inhabit diverse aquatic environments.
Purpose of the Study:
- Investigate Acanthamoeba castellanii's ability to host Vibrio mimicus.
- Determine the role of bacterial protease in V. mimicus-A. castellanii interaction.
- Assess the protective capacity of Acanthamoeba cysts against intracellular V. mimicus.
Main Methods:
- Co-cultivation of V. mimicus (wild type and luxO mutant) with A. castellanii.
- Viable counts and gentamicin protection assays.
- Electron microscopy and statistical analysis.
Main Results:
- Co-cultivation did not inhibit A. castellanii growth but enhanced V. mimicus survival.
- V. mimicus exhibited intracellular behavior, residing in amoeba cytoplasm for up to 14 days.
- A. castellanii cysts protected intracellular V. mimicus from high gentamicin concentrations.
Conclusions:
- Acanthamoeba castellanii serves as a host for Vibrio mimicus.
- Intracellular survival and cyst protection suggest A. castellanii's role in V. mimicus environmental persistence.
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