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Acoustic Vibration Can Enhance Bacterial Biofilm Formation

Murphy, MF and Edwards, T and Hobbs, G and Shepherd, J and Bezombes, F (2016) Acoustic Vibration Can Enhance Bacterial Biofilm Formation. Journal of Bioscience and Bioengineering. ISSN 1347-4421

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Abstract

This paper explores the use of low-frequency-low-amplitude acoustic vibration on biofilm formation. Biofilm development is thought to be governed by a diverse range of environmental signals and much effort has gone into researching the effects of environmental factors including; nutrient availability, pH and temperature on the growth of biofilms. Many biofilm-forming organisms have evolved to thrive in mechanically challenging environments, for example soil yet, the effects of the physical environment on biofilm formation has been largely ignored. Exposure of Pseudomonas aeruginosa to vibration at 100, 800 and 1600Hz for 48 hours, resulted in a significant increase in biofilm formation compared with the control, with the greatest growth seen at 800Hz vibration. The results also show that this increase in biofilm formation is accompanied with an increase in P. aeruginosa cell number. Acoustic vibration was also found to regulate the spatial distribution of biofilm formation in a frequency-dependent manner. Exposure of Staphylococcus aureus to acoustic vibration also resulted in enhanced biofilm formation with the greatest level of biofilm being formed following 48hours exposure at 1600Hz. These results show that acoustic vibration can be used to control biofilm formation and therefore presents a novel and potentially cost effective means to manipulate the development and yield of biofilms in a range of important industrial and medical processes.

Item Type: Article
Uncontrolled Keywords: 06 Biological Sciences, 09 Engineering, 10 Technology
Subjects: Q Science > QH Natural history > QH301 Biology
T Technology > T Technology (General)
Divisions: General Engineering Research Institute
Pharmacy & Biomolecular Sciences
Publisher: Elsevier
Date Deposited: 13 Jun 2016 14:04
Last Modified: 06 Sep 2017 21:14
DOI or Identification number: 10.1016/j.jbiosc.2016.05.010
URI: http://researchonline.ljmu.ac.uk/id/eprint/3777

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