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An enhanced domestication method for uncultured bacteria
Andrew G Morrison1, Raphaella Jackson1, Paul S Freemont1
1Department of Infectious Disease, Imperial College, London, SW7 2AZ, United Kingdom.
ISME Communications
|April 17, 2026
Summary
The enhanced domestication (EDEN) method improves bacterial cultivation by gradually acclimatizing microbes to lab conditions. This approach significantly increases the diversity and number of cultured bacteria, including previously uncultured species.
Area of Science:
- Microbiology
- Biotechnology
Background:
- Environmental bacteria face challenges adapting to laboratory cultivation, limiting the study of microbial diversity.
- Standard cultivation methods fail to culture the majority of bacterial species, hindering exploration of their functions and potential applications.
Purpose of the Study:
- To introduce and evaluate an enhanced domestication (EDEN) method for improving bacterial cultivation.
- To increase the diversity and yield of cultured bacteria, including those previously uncultured.
Main Methods:
- Development of a 3D-printable microwell plate with integrated growth chambers and continuous-flow media reservoirs for controlled bacterial acclimatization.
- Application of the EDEN method to bacterial polycultures and monocultures, followed by amplicon sequencing to assess diversity.
- Evaluation of EDEN's impact on the cultivability of agarose-encapsulated microcolonies.
Main Results:
- EDEN significantly increased bacterial diversity and the proportion of likely-uncultured taxa in both polycultures and monocultures compared to standard methods.
- The EDEN method doubled the cultivability of agarose-encapsulated microcolonies.
- A previously uncultured bacterium with broad-spectrum antimicrobial activity against drug-resistant pathogens was successfully isolated using EDEN.
Conclusions:
- The enhanced domestication (EDEN) method represents a significant advancement in bacterial cultivation techniques.
- EDEN facilitates the exploration of microbial diversity and the discovery of novel bacteria with valuable biotechnological properties, such as antimicrobial compounds.
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