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The use of ultrasonic imaging to evaluate the effect of protozoan grazing and movement on the topography of bacterial biofilms

Citation

Parry, JD and Holmes, AK and Unwin, ME and Laybourn-Parry, J, The use of ultrasonic imaging to evaluate the effect of protozoan grazing and movement on the topography of bacterial biofilms, Letters in Applied Microbiology, 45, (4) pp. 364-370. ISSN 0266-8254 (2007) [Refereed Article]


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Copyright Statement

The definitive published version is available online at: http://interscience.wiley.com

Official URL: http://interscience.wiley.com

DOI: doi:10.1111/j.1472-765X.2007.02213.x

Abstract

Aims: This study evaluated the effect of protozoan movement and grazing on the topography of a dual-bacterial biofilm using both conventional light microscopy and a new ultrasonic technique. Methods and Results: Coupons of dialysis membrane were incubated in Chalkley’s medium for 3 days at 23!C in the presence of bacteria (Pseudomonas aeruginosa and Klebsiella aerogenes) alone, or in co-culture with the flagellate Bodo designis, the ciliate Tetrahymena pyriformis or the amoeba Acanthamoeba castellanii. Amoebic presence resulted in a confluent biofilm similar to the bacteria-only biofilm while the flagellate and ciliate created more diverse biofilm topographies comprising bacterial microcolonies and cavities. Conclusions: The four distinct biofilm topographies were successfully discerned with ultrasonic imaging and the method yielded information similar to that obtained with conventional light microscopy. Significance and Impact of the Study: Ultrasonic imaging provides a potential way forward in the development of a portable, nondestructive technique for profiling the topography of biofilms in situ, which might aid in the future management of biofouling.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Microbiology
Research Field:Microbial Ecology
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Antarctic and Sub-Antarctic Flora, Fauna and Biodiversity
Author:Laybourn-Parry, J (Professor Johanna Laybourn-Parry)
ID Code:49020
Year Published:2007
Web of Science® Times Cited:7
Deposited By:Research Division
Deposited On:2007-11-12
Last Modified:2009-06-09
Downloads:0

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