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Honey-based trap for Pseudomonas: a sustainable prototype for water disinfection

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Abstract

This paper introduces a novel prototype for the removal of Pseudomonas from water samples. Bacterial cells have the tendency to get attracted towards specific chemicals (chemotaxis); a ‘honey-based trap’ (henceforth, addressed as ‘honey-trap’) strip was conceptualized by integrating a combination of serine, pseudomonas-specific chemoattractant and honey to attract and inhibit the bacteria in situ. Honey, a natural antimicrobial agent, has garnered the attention as an effective inhibitor for Pseudomonal biofilms and wound infections. Dipping serine side of the strip attracted bacteria towards honey-trap, whereby the porous nature of the strip facilitated the ‘trapping’ and subsequent diffusion of the bacterial cells towards honey-adsorbed end of the strip. This ‘honey-trap’ reportedly leads to the targeted elimination of Pseudomonas, hence facilitating its removal. The percentage efficacy of this ‘honey-trap’ device is 96% with a log reduction equivalent to 1.6 within a time frame of 2 h. Pseudomonas aeruginosa, although, not a natural contaminant of potable water, enters circulation due to improperly maintained plumbing fixtures and storage facilities. Honey-trap strip is an easy to use, biodegradable and cost-effective sustainable solution, and thus a scaled-up version of this device may enable substantial improvement in quality of potable water.

Graphic abstract

Schematics showing the preparation and working of the Pseudomonas Honey-trap. Serine as an attractant and honey as an inhibitor was absorbed on filter strips (HT) for use. The strip was dipped in culture from serine end. After different time period of incubation, difference in bacterial load was confirmed by measuring the electrical conductivity and OD600nm of the culture. Additionally, inhibitory effect of HS was confirmed by placing the strip incubated with culture on agar plates and differences in bacterial lawn were monitored. Removal of bacterial cells from the suspension was also confirmed using absorption spectroscopy.

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Acknowledgements

The authors thank Mr. Bhupesh Sharma, Scientific officer, MRC, MNIT, Jaipur for his technical assistance in acquiring scanning electron microscopy images. Authors acknowledge Dr. Deepshikha Rathore for proofreading the document.

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The work received no funding from any authority.

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Contributions

MD conceived the idea; HR and PP performed the experimental work; MD, DP and HR contributed to writing of the manuscript, HR and PP prepared figures and/or tables. MD and DP reviewed and approved the final draft.

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Correspondence to Manali Datta.

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The authors declare no competing interest from any source.

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Communicated by Erko Stackebrandt.

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Ranade, H., Paliwal, P., Pal, D. et al. Honey-based trap for Pseudomonas: a sustainable prototype for water disinfection. Arch Microbiol 203, 6061–6069 (2021). https://doi.org/10.1007/s00203-021-02568-0

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  • DOI: https://doi.org/10.1007/s00203-021-02568-0

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