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. 2010 Mar;108(3):859-867.
doi: 10.1111/j.1365-2672.2009.04492.x. Epub 2009 Jul 20.

Use of multiple-locus variable number tandem repeat analysis and phage typing for subtyping of Salmonella Enteritidis from sporadic human cases in the United States

S Cho  1 , T S Whittam  1 , D J Boxrud  2 , J M Bartkus  2 , S C Rankin  3 , M J Wilkins  4 , P Somsel  4 , F P Downes  4 , K A Musser  5 , T P Root  5 , L D Warnick  6 , M Wiedmann  6 , A M Saeed  1
Affiliations

Use of multiple-locus variable number tandem repeat analysis and phage typing for subtyping of Salmonella Enteritidis from sporadic human cases in the United States

S Cho et al. J Appl Microbiol. 2010 Mar.

Abstract

Aims: To investigate the genetic diversity among S. Enteritidis isolates from different geographic regions to evaluate the relationship between phage types (PTs) and variable number tandem repeat analysis (VNTR) loci.

Methods and results: We performed multiple-locus variable number tandem repeat analysis (MLVA) and phage typing on 245 S. Enteritidis isolates collected from sporadic human clinical cases in Michigan, Minnesota, New York, and Washington states between 2000 and 2007. Ninety-four MLVA types and 22 different PTs were identified. Specific PTs were associated with a predominant allele for certain VNTR loci. Cluster analysis using a minimum-spanning tree demonstrated two major clusters (I, II) and one minor cluster of isolates. PTs 8, 13a, 13 and 34 were significantly associated with MLVA cluster I. Phage types 1, 4, 6a, and 18 were significantly associated with MLVA cluster II.

Conclusions: We found significant association between MLVA-based clusters and PTs. Certain VNTR loci were associated with specific PTs and could serve as useful molecular markers for S. Enteritidis in epidemiological investigations.

Significance and impact of the study: MLVA genotyping in combination with phage typing can be used for effective characterization of S. Enteritidis isolates. It can also be useful for tracing possible sources during investigations of sporadic and outbreak cases of S. Enteritidis.

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References

    1. Van Belkum, A. (1999) Short sequence repeats in microbial pathogenesis and evolution. Cell Mol Life Sci 56, 729-734.
    1. Beranek, A., Mikula, C., Rabold, P., Arnhold, D., Berghold, C., Lederer, I., Allerberger, F. and Kornschober, C. (2009) Multiple-locus variable-number tandem repeat analysis for subtyping of Salmonella enterica subsp. enterica serovar Enteritidis. Int J Med Microbiol 299, 43-51.
    1. Boxrud, D., Pederson-Gulrud, K., Wotton, J., Medus, C., Lyszkowicz, E., Besser, J. and Bartkus, J.M. (2007) Comparison of multiple-locus variable-number tandem repeat analysis, pulsed-field gel electrophoresis, and phage typing for subtype analysis of Salmonella enterica serotype Enteritidis. J Clin Microbiol 45, 536-543.
    1. CDC (2008) Preliminary FoodNet data on the incidence of infection with pathogens transmitted commonly through food - 10 states, 2007. MMWR Morb Mortal Wkly Rep 57, 366-370.
    1. Cho, S., Boxrud, D.J., Bartkus, J.M., Whittam, T.S. and Saeed, M. (2007) Multiple-locus variable-number tandem repeat analysis of Salmonella Enteritidis isolates from human and non-human sources using a single multiplex PCR. FEMS Microbiol Lett 275, 16-23.

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