Silver-Palladium Surfaces Inhibit Biofilm Formation

Wen-Chi Chiang, Casper Schroll, Lisbeth Rischel Hilbert, Per Møller, Tim Tolker-Nielsen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Undesired biofilm formation is a major concern in many areas. In the present study, we investigated biofilm-inhibiting properties of a silver-palladium surface that kills bacteria by generating microelectric fields and electrochemical redox processes. For evaluation of the biofilm inhibition efficacy and study of the biofilm inhibition mechanism, the silver-sensitive Escherichia coli J53 and the silver-resistant E. coli J53[pMG101] strains were used as model organisms, and batch and flow chamber setups were used as model systems. In the case of the silver-sensitive strain, the silver-palladium surfaces killed the bacteria and prevented biofilm formation under conditions of low or high bacterial load. In the case of the silver-resistant strain, the silver-palladium surfaces killed surface-associated bacteria and prevented biofilm formation under conditions of low bacterial load, whereas under conditions of high bacterial load, biofilm formation occurred upon a layer of surface-associated dead bacteria.
Original languageEnglish
JournalApplied and Environmental Microbiology
Volume75
Issue number6
Pages (from-to)1674-1678
ISSN0099-2240
DOIs
Publication statusPublished - 2009

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