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Applied and Environmental Microbiology, August 2006, p. 5211-5217, Vol. 72, No. 8
0099-2240/06/$08.00+0     doi:10.1128/AEM.01060-05
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Aggregative Behavior of Bacteria Isolated from Canine Dental Plaque

David R. Elliott,1 Michael Wilson,1 Catherine M. F. Buckley,2 and David A. Spratt1*

Division of Microbial Diseases, Eastman Dental Institute for Oral Health Care Sciences, University College London, 256 Gray's Inn Road, London WC1X 8LD, United Kingdom,1 Waltham Centre for Pet Nutrition, Waltham-on-the-Wolds, Melton Mowbray, Leicestershire LE14 4RT, United Kingdom2

Received 9 May 2005/ Accepted 22 May 2006

Interbacterial adhesion of bacteria isolated from canine dental plaque was assessed by performing a visual coaggregation assay. Using conditions mimicking those likely to be encountered in vivo, the entire cultivable plaque microbiota from a single dog was assessed, and eight (6.7%) unique coaggregation interactions were detected for 120 crosses. Transmission electron microscopy was used to visualize several of the bacteria in isolation and as coaggregates, which revealed surface structures that may be involved in adhesion and coaggregation. The results of this study indicate that the prevalence of coaggregating pairs of dental plaque bacteria in dogs is similar to the prevalence of coaggregating pairs of dental plaque bacteria reported in humans. In addition, genera found in both hosts generally exhibited similar coaggregation reactions; however, autoaggregation was found to be more common among oral bacteria isolated from dogs.

* Corresponding author. Mailing address: Division of Microbial Diseases, Eastman Dental Institute for Oral Health Care Sciences, University College London, 256 Gray's Inn Road, London WC1X 8LD, United Kingdom. Phone: 44 20 7915 1107. Fax: 44 20 7915 1127. E-mail: d.spratt{at}eastman.ucl.ac.uk.

Applied and Environmental Microbiology, August 2006, p. 5211-5217, Vol. 72, No. 8
0099-2240/06/$08.00+0     doi:10.1128/AEM.01060-05
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



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Copyright © 2006 by the American Society for Microbiology. All rights reserved.