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Journal of Dental Research
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Bacteria Interfere with A. actinomycetemcomitans Colonization

W. Teughels1,*, S. Kinder Haake2, I. Sliepen1, M. Pauwels1, J. Van Eldere3, J.-J. Cassiman4 and M. Quirynen1

1 Catholic University Leuven, Research Group for Microbial Adhesion, Department of Periodontology, Kapucijnenvoer 7, 3000 Leuven, Belgium;
2 UCLA, School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA, USA;
3 Catholic University Leuven, Centre for Molecular Diagnostics, Herestraat 49, 3000 Leuven, Belgium; and
4 Catholic University Leuven, Centre for Human Genetics, Herestraat 49, 3000 Leuven, Belgium


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  		Figure 1. Effect of interaction on A. actinomycetemcomitans and test strain colonization of epithelial cells. (A) Mean A. actinomycetemcomitans colonization of epithelial cells in competition (white), exclusion (grey), and displacement (black) assays as a percent of the colonization in the control assay (= 100%) with A. actinomycetemcomitans alone. Error bars represent standard error of the mean. (B) Mean test strain colonization of epithelial cells and standard error of the mean in the same (A) competition, exclusion, and displacement assays with A. actinomycetemcomitans. Data are expressed as a percent of the colonization in the control assay (100%, indicated by the horizontal bar) with the respective strain alone. * above bar represents significantly different (p < 0.05) from control assay (= 100%). Arrows represent significantly different (p < 0.05) among competition, exclusion, and displacement assays. Experiments were performed in triplicate on 4 independent days.

 

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  		Figure 2. Effect of test strain/pathogen ratio on A. actinomycetemcomitans colonization. Mean A. actinomycetemcomitans colonization of epithelial cells and standard error of the mean in competition assays with S. mitis, S. salivarius, or S. sanguinis with beneficial-pathogen ratios of 10:1 (white), 1:1 (grey), and 1:10 (black). Data are expressed as the percent of colonization in the control assay (= 100%) with A. actinomycetemcomitans alone. * represents significantly different (p < 0.05) from control assay (= 100%). Experiments were performed in triplicate on 4 independent days.

 

Journal of Dental Research, Vol. 86, No. 7, 611-617 (2007)
DOI: 10.1177/154405910708600706
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