Systematic analysis of the ability of Nitric Oxide donors to dislodge biofilms formed by Salmonella enterica and Escherichia coli O157:H7

Article


Marvasi, M., Chen, C., Carrazana, M., Durie, I. and Teplitski, M. 2014. Systematic analysis of the ability of Nitric Oxide donors to dislodge biofilms formed by Salmonella enterica and Escherichia coli O157:H7. AMB Express. 4. https://doi.org/10.1186/s13568-014-0042-y
TypeArticle
TitleSystematic analysis of the ability of Nitric Oxide donors to dislodge biofilms formed by Salmonella enterica and Escherichia coli O157:H7
AuthorsMarvasi, M., Chen, C., Carrazana, M., Durie, I. and Teplitski, M.
Abstract

Biofilms in the industrial environment could be problematic. Encased in extracellular polymeric substances, pathogens within biofilms are significantly more resistant to chlorine and other disinfectants. Recent studies suggest that compounds capable of manipulating nitric oxide-mediated signaling in bacteria could induce dispersal of sessile bacteria and provide a foundation for novel approaches to controlling biofilms formed by some microorganisms. In this work, we compared the ability of five nitric oxide donors (molsidomine, MAHMA NONOate, diethylamine NONOate, diethylamine NONOate diethylammonium salt, spermine NONOate) to dislodge biofilms formed by non-typhoidal Salmonella enterica and pathogenic E. coli on plastic and stainless steel surfaces at different temperatures. All five nitric oxide donors induced significant (35-80%) dispersal of biofilms, however, the degree of dispersal and the optimal dispersal conditions varied. MAHMA NONOate and molsidomine were strong dispersants of the Salmonella biofilms formed on polystyrene. Importantly, molsidomine induced dispersal of up to 50% of the pre-formed Salmonella biofilm at 4 degrees C, suggesting that it could be effective even under refrigerated conditions. Biofilms formed by E. coli O157:H7 were also significantly dispersed. Nitric oxide donor molecules were highly active within 6 hours of application. To better understand mode of action of these compounds, we identified Salmonella genomic region recA-hydN, deletion of which led to an insensitivity to the nitric oxide donors.

KeywordsBacterial signaling, Biofilm control, Food-borne pathogens, Nitric oxide
PublisherSpringer
JournalAMB Express
ISSN2191-0855
Publication dates
Print2014
Publication process dates
Deposited06 May 2015
Accepted10 Apr 2014
Output statusPublished
Publisher's version
Additional information

Article number = 42

Digital Object Identifier (DOI)https://doi.org/10.1186/s13568-014-0042-y
LanguageEnglish
Place of publicationGermany
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https://repository.mdx.ac.uk/item/853yx

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