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Method for 3D tracking behaviors of interplaying bacteria individuals
Optics Express
|September 29, 2020
Summary
Tracking multiple bacteria in 3D is now possible using digital holographic microscopy (DHM). This method reveals how interacting Escherichia coli change their movement patterns when approaching or moving away from each other.
Area of Science:
- Microbiology
- Biophysics
- Microscopy
Background:
- Bacterial interactions significantly influence individual behaviors.
- Tracking individual bacteria during close interactions is challenging due to identification and localization difficulties.
Purpose of the Study:
- To develop and validate a method for 3D tracking of multiple bacteria.
- To characterize subtle 3D behaviors during bacterial interplay.
- To investigate how interacting Escherichia coli alter their motion.
Main Methods:
- Utilizing digital holographic microscopy (DHM) for 3D tracking of bacterial movements.
- Developing an algorithm for identifying and reconstructing interrupted 3D trajectories.
- Employing lateral image recognition and axial localization with a cost function for trajectory recovery.
Main Results:
- Successfully achieved 3D tracking of multiple bacteria.
- The developed algorithm effectively identifies and recovers gaps in 3D trajectories.
- Performance validated through trajectory length statistics and correct rate analysis.
- Demonstrated distinct motion alterations in interacting Escherichia coli.
Conclusions:
- Digital holographic microscopy (DHM) enables advanced 3D tracking of bacterial dynamics.
- The novel algorithm overcomes challenges in tracking bacteria during close interactions.
- This study provides insights into the behavioral responses of Escherichia coli during interplay.
