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Applied and Environmental Microbiology, March 2009, p. 1796-1799, Vol. 75, No. 6
0099-2240/09/$08.00+0     doi:10.1128/AEM.02232-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

Comparative Analysis of Attachment of Shiga-Toxigenic Escherichia coli and Salmonella Strains to Cultured HT-29 and Caco-2 Cell Lines{triangledown}

Glen E. Mellor,1 Rebecca M. Goulter,1,2 T. W. Raymond Chia,1,3 and Gary A. Dykes1*

Food Science Australia, Brisbane, Queensland, Australia,1 School of Molecular and Microbial Sciences, University of Queensland, Brisbane, Queensland, Australia,2 School of Agricultural Science, University of Tasmania, Hobart, Tasmania, Australia3

Received 28 September 2008/ Accepted 12 January 2009

The ability of Escherichia coli and Salmonella isolates to attach to Caco-2 and HT-29 cell monolayers was measured. All isolates displayed a greater ability to attach to Caco-2 cells than HT-29 cells, and overall E. coli isolates attached better to both cell lines than Salmonella isolates. Bacteria that were considered to be pathogenic displayed no greater ability to attach to cell lines than those that were not considered to be pathogenic. Additionally, no correlation was found between cell line attachment and previously determined hydrophobicity results.

* Corresponding author. Mailing address: Food Science Australia, P.O. Box 3312, Tingalpa DC, Queensland 4173, Australia. Phone: 61 7 3214 2037. Fax: 61 7 3214 2150. E-mail: gary.dykes{at}csiro.au

{triangledown} Published ahead of print on 23 January 2009.

Applied and Environmental Microbiology, March 2009, p. 1796-1799, Vol. 75, No. 6
0099-2240/09/$08.00+0     doi:10.1128/AEM.02232-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.





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