Single-cell analysis reveals microbial spore responses to sodium hypochlorite
Weiming Yang1,2, Yufeng Yuan1, Lin He1
1School of Electrical Engineering and Intelligentization, Dongguan University of Technology, Dongguan, Guangdong, China.
Journal of Biophotonics
|April 13, 2024
Summary
This study reveals how sodium hypochlorite affects Bacillus subtilis spores at the molecular and cellular levels. Understanding spore resistance to disinfectants is key for developing effective decontamination strategies.
Area of Science:
- Microbiology
- Biophysics
- Materials Science
Background:
- Bacterial spores are highly resistant to disinfectants, posing challenges for decontamination.
- Effective spore decontamination strategies require understanding their response to chemical agents.
Purpose of the Study:
- To investigate the effects of 0.5% sodium hypochlorite on single Bacillus subtilis spores.
- To analyze molecular and morphological changes in spores upon disinfectant treatment.
Main Methods:
- Single-cell techniques including Laser Tweezers Raman Spectroscopy (LTRS).
- Atomic Force Microscopy (AFM) for morphological analysis.
- Live-cell imaging to assess germination and growth.
Main Results:
- Sodium hypochlorite induced calcium-dipicolinic acid release and nucleic acid denaturation.
- Spore surface morphology changed, protein shells degraded, and permeability was lost.
- Spore volume decreased, and germination/growth rates were significantly reduced.
Conclusions:
- Sodium hypochlorite damages Bacillus subtilis spores by altering their molecular and structural integrity.
- Disinfectant exposure significantly inhibits spore germination and growth.
- Findings offer insights into spore resistance mechanisms and decontamination efficacy.
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