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Metagenomic Analysis of Regularly Microwave-Treated and Untreated Domestic Kitchen Sponges
Susanne Jacksch1, Jyothi Thota1, Sudarshan Shetty2
1Faculty of Medical and Life Sciences, Institute of Precision Medicine, Microbiology and Hygiene Group, Furtwangen University, 78054 Villingen-Schwenningen, Germany.
Abstract:
Kitchen sponges massively absorb and spread microorganisms, leading to contamination of kitchen appliances, surfaces, and food. Microwaving as an effective and widespread technique can rapidly reduce the microbial load of kitchen sponges. However, long-term effects of such treatments are largely unknown. Notably, it has been speculated that regularly applied domestic cleaning and disinfection may select for microbial communities with a higher pathogenic potential and/or malodorous properties. In this study, we distributed newly purchased polyurethane kitchen sponges to 20 participants, with the instruction to use them under normal household conditions for four weeks. Ten of the participants sanitized their sponges regularly by a standardized microwaving protocol, while the remaining ten sponges remained untreated. Metagenomic sequence data evaluation indicated that, in addition to bacteria, viruses, eukaryotes, and archaea were also part of the kitchen sponge microbiome. Comparisons of sanitized and untreated kitchen sponges indicated a trend towards a reduced structural microbial diversity while functional diversity increased. Microwave sanitization appeared to alter composition and metabolic properties of the microbial communities. Follow-up studies will have to show whether these changes are more positive or negative in terms of domestic hygiene, human health, and well-being.
Insights
Microwaving kitchen sponges reduces microbial load but may alter microbial communities. Further research is needed to determine if these changes impact domestic hygiene and human health positively or negatively.
Area of Science:
- Microbiology
- Environmental Science
- Domestic Hygiene
Background:
- Kitchen sponges harbor diverse microorganisms, posing contamination risks.
- Microwaving is a common method to reduce microbial load in sponges.
- Long-term effects of regular microwave sanitization on sponge microbial communities are unknown.
Purpose of the Study:
- To investigate the long-term effects of microwave sanitization on kitchen sponge microbial communities.
- To analyze changes in microbial diversity and metabolic properties.
- To assess potential implications for domestic hygiene and human health.
Main Methods:
- Twenty participants used polyurethane kitchen sponges for four weeks.
- Ten sponges were regularly sanitized using a standardized microwaving protocol.
- Metagenomic sequencing was employed to analyze microbial composition and function.
Main Results:
- Kitchen sponge microbiomes include bacteria, viruses, eukaryotes, and archaea.
- Microwave sanitization showed a trend towards reduced structural microbial diversity.
- Functional diversity increased, and microbial community composition and metabolic properties were altered.
Conclusions:
- Regular microwave sanitization impacts the overall microbial community in kitchen sponges.
- Altered microbial composition and function may have implications for hygiene and health.
- Further studies are required to ascertain the positive or negative consequences of these changes.
