The Genomic Island SGI1, Containing the Multiple Antibiotic Resistance Region of Salmonella enterica Serovar Typhimurium DT104 or Variants of It, Is Widely Distributed in Other S. enterica Serovars

Author:

Levings Renee S.12,Lightfoot Diane3,Partridge Sally R.4,Hall Ruth M.5,Djordjevic Steven P.1

Affiliation:

1. New South Wales Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Microbiology and Immunology Section, Camden, New South Wales 2570

2. Department of Biological Sciences, University of Wollongong, New South Wales 2522

3. Microbiological Diagnostic Unit, Public Health Laboratory, Department of Microbiology and Immunology, University of Melbourne, Victoria 3013

4. Department of Biological Sciences, Macquarie University Sydney, New South Wales 2109

5. School of Molecular and Microbial Biosciences, University of Sydney, New South Wales 2006, Australia

Abstract

ABSTRACT The global dissemination of the multiply-antibiotic-resistant Salmonella enterica serovar Typhimurium DT104 clone with the resistance genes located in a class 1 integron, here designated In104, within genomic island SGI1 is a significant public health issue. Here, we have shown that SGI1 and variants of it carrying different combinations of resistance genes are found in several Salmonella enterica serovars. These are serovars Cerro, Derby, Dusseldorf, Infantis, Kiambu, and Paratyphi B dT + isolated from human infections and serovar Emek from sewage effluent. Two new variants, SGI1-I and SGI1-J, both of which include the dfrA1 -orfC cassette array, were identified.

Publisher

American Society for Microbiology

Subject

Molecular Biology,Microbiology

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