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Using Chemoattractants to Lure Bacteria to Contact‐Killing Surfaces |
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| Authors: | Dr Rishabh Jain Nancy G Faith Dr Andrew Milkowski Kevin Nelson David Busche Prof David M Lynn Prof Charles J Czuprynski Prof Nicholas L Abbott |
| Affiliation: | 1. Department of Chemical and Biological Engineering, University of Wisconsin–Madison, Madison, WI, USA;2. Department of Pathobiological Sciences, University of Wisconsin–Madison, Madison, WI, USA;3. Department of Animal Sciences, University of Wisconsin–Madison, Madison, WI, USA;4. Bemis Company, Inc., Neenah, WI, USA |
| Abstract: | Antimicrobial surfaces with covalently attached biocidal functionalities only kill microbes that come into direct contact with the surfaces (contact‐killing surfaces). Herein, the activity of contact‐killing surfaces is shown to be enhanced by using gradients in the concentration of soluble chemoattractants (CAs) to attract bacteria to the surfaces. Two natural and nonbiocidal CAs (aspartate and glucose) were used to attract bacteria to model surfaces decorated with quaternary ammonium groups (known to kill bacteria that come into contact with them). These results demonstrate the killing of Escherichia coli and Salmonella typhimurium, two common pathogens, at levels 10‐ to 20‐times greater than that of the native surfaces alone. This approach is general and provides new strategies for the design of active or dynamic contact‐killing surfaces with enhanced antimicrobial activities. |
| Keywords: | antimicrobial agents bacteria chemoattractants surface chemistry |
