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Laboratory Techniques Used to Maintain and Differentiate Biotypes of Vibrio cholerae Clinical and Environmental Isolates
Published on: May 30, 2017
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Vibrio cholerae Released by Protozoa are Hyperinfectious
Fabian Mitterer1, Joao Palma Pombo1, Stefan Schild2
1Institute of Molecular Biosciences, University of Graz, Humboldtstrasse 50, 8010 Graz, Austria.
Trends in Microbiology
|November 30, 2019
Summary
Vibrio cholerae uses protozoan predation as a novel transmission route, escaping in expelled food vacuoles. This protects the bacteria and enhances intestinal colonization after ingestion.
Area of Science:
- Microbiology
- Environmental Science
- Pathogen Biology
Background:
- Vibrio cholerae is a significant human pathogen responsible for cholera outbreaks.
- Understanding pathogen transmission is crucial for effective disease control.
- Environmental reservoirs and transmission routes for V. cholerae are not fully elucidated.
Purpose of the Study:
- To investigate a novel transmission mode of Vibrio cholerae.
- To explore the role of environmental protozoa in V. cholerae dissemination.
- To determine the survival and colonization advantages of V. cholerae within expelled food vacuoles.
Main Methods:
- Microscopic observation of V. cholerae-protozoa interactions.
- Co-culture experiments to assess bacterial survival and replication.
- In vitro assays to evaluate protection against environmental stressors.
- Animal models to assess intestinal colonization fitness after oral ingestion.
Main Results:
- Vibrio cholerae utilizes environmental protozoan predation as a transmission mechanism.
- Bacteria are released from protozoa within expelled food vacuoles.
- Vacuole-enclosed V. cholerae exhibit increased resistance to environmental stressors.
- Ingestion of vacuole-enclosed V. cholerae leads to enhanced intestinal colonization.
Conclusions:
- Protozoan predation represents a previously unrecognized transmission route for Vibrio cholerae.
- Expelled food vacuoles serve as protective vesicles, enhancing bacterial survival and infectivity.
- This discovery offers new insights into the environmental ecology and transmission dynamics of V. cholerae.
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