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Cooking-Derived Organic Compounds Shape Bacterial Communities on Household Surfaces
Wing Lam Chan1, Shicong Du1, Huiju Lin2
1School of Energy and Environment, City University of Hong Kong, Hong Kong SAR, China.
Environmental Science & Technology
|July 7, 2025
Summary
Routine oil-based cooking significantly impacts indoor surface microbes. Cooking emissions increase bacteria but decrease microbial diversity, revealing key chemical-biological interactions in homes.
Area of Science:
- Environmental Science
- Microbiology
- Indoor Air Quality
Background:
- Understanding indoor surface contaminants is vital due to extensive human time spent indoors.
- Limited research exists on the temporal dynamics and interplay between chemical and biological constituents on indoor surfaces.
Purpose of the Study:
- To investigate factors influencing chemical and biological constituents on indoor surfaces.
- To explore the relationship between household activities, specifically cooking, and indoor microbial communities.
Main Methods:
- A month-long spatiotemporal field study was conducted in 20 Hong Kong households.
- Analyzed 16 household and occupant factors, focusing on kitchen surfaces and cooking frequency.
- Utilized network analysis to examine interactions between organic compounds and bacterial taxa.
Main Results:
- Routine oil-based cooking was identified as the primary driver of microbial diversity and composition.
- Elevated total organic carbon in kitchens correlated with increased bacterial abundance.
- Cooking-derived organic compounds, like alkanes, promoted bacterial growth while reducing microbial diversity.
Conclusions:
- Household activities, particularly cooking, profoundly influence indoor chemical-biological interactions.
- Findings enhance understanding of indoor environments and inform strategies for occupant well-being.
- Specific organic compounds from cooking interact with bacterial taxa, affecting microbial ecosystems.
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