A new real-time PCR method for the identification of Salmonella Dublin

Authors


  • The results were presented in part at the 22nd International ICFMH Symposium- Food Micro 2010 (Copenhagen, 30 August to 3 September, 2010) Poster no.: PEC1.67.

Correspondence

Søren Persson, Department of Microbiological Diagnostics, The National Reference Laboratory for Enteropathogenic Bacteria, Statens Serum Institut, Artillerivej 5, 2300 Copenhagen S, Denmark. E-mail: SPN@ssi.dk

Abstract

Aims

Development of a real-time PCR method for the specific detection of Salmonella Dublin.

Methods and Results

The method was directed towards a Salm. Dublin-specific sequence of the vagC gene on the Salmonella virulence plasmid (pSDV) and towards Salmonella genus-specific sequence of the invA gene, serving as an internal amplification control. The method showed 100% inclusivity and exclusivity when tested on a strain collection containing 50 serotyped S . Dublin strains, 20 strains of other Salmonella serotypes and 10 non- Salmonella strains. The method also showed 100% inclusivity and 99% exclusivity in a collaborative study comprising eight laboratories, where each laboratory received ten different S . Dublin strains and 10 other Salmonella serotypes.

Conclusions

The method showed excellent performance both when validated in the laboratory and in the collaborative study.

Significance and Impact of the Study

Application of the present method in food control, for example at slaughterhouses, can improve the contamination control of this veterinary and clinically important Salmonella serotype.

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