TITLE

Microarray analysis of virulence gene profiles in Salmonella serovars from food/food animal environment

AUTHOR(S)
Wen Zou; Al-Khaldi, Sufian F.; Branham, William S.; Tao Han; Fuscoe, James C.; Jing Han; Foley, Steven L.; Xu, Joshua; Hong Fang; Cerniglia, Carl E.; Nayak, Rajesh
PUB. DATE
February 2011
SOURCE
Journal of Infection in Developing Countries;Feb2011, Vol. 5 Issue 2, p94
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Introduction: Rapid, accurate and inexpensive analysis of the disease-causing potential of foodborne pathogens is an important consideration in food safety and biodefense, particularly in developing countries. The objective of this study is to demonstrate the use of a robust and inexpensive microarray platform to assay the virulence gene profiles in Salmonella from food and/or the food animal environment, and then TM use ArrayTrack for data analysis. Methodology: The spotted array consisted of 69 selected Salmonella-specific virulence gene probes (65bp each). These probes were printed on poly-L-lysine-coated slides. Genomic DNA was digested with Sau3AI, labeled with Cy3 dye, hybridized to the gene probes, and the TM images were captured and analyzed by GenePix 4000B and ArrayTrack , a free software developed by Food and Drug Administration (FDA) researchers. Results: Nearly 58% of the virulence-associated genes tested were present in all Salmonella strains tested. In general, genes belonging to inv, pip, prg, sic, sip, spa or ttr families were detected in more than 90% of the isolates, while the iacP, avrA, invH, rhuM, sirA, sopB, sopE or sugR genes were detected in 40 to 80% of the isolates. The gene variability was independent of the Salmonella serotype. Conclusions: This hybridization array presents an accurate and cost-effective method for evaluating the disease-causing potential of Salmonella in outbreak investigations by targeting a selective set of Salmonella-associated virulence genes.
ACCESSION #
65362712

 

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