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Journal of Bacteriology, October 2001, p. 5725-5732, Vol. 183, No. 19
0021-9193/01/$04.00+0 DOI: 10.1128/JB.183.19.5725-5732.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Complete Nucleotide Sequence of a 43-Kilobase Genomic Island
Associated with the Multidrug Resistance Region of Salmonella
enterica Serovar Typhimurium DT104 and Its Identification in
Phage Type DT120 and Serovar Agona
David
Boyd,1
Geoffrey A.
Peters,1
Axel
Cloeckaert,2
Karim Sidi
Boumedine,2
Elisabeth
Chaslus-Dancla,2
Hein
Imberechts,3 and
Michael R.
Mulvey1,*
National Microbiology Laboratory, Health
Canada, Winnipeg, Manitoba R3E 3R2, Canada1;
Station de Pathologie Aviaire et Parasitologie, Institut
National de la Recherche Agronomique, 37380 Nouzilly,
France2; and Centre d'Etude et de
Recherches Vétérinaires et Agrochimiques, B-1180 Brussels,
Belgium3
Received 14 February 2001/Accepted 5 July 2001
This study describes the characterization of the recently described
Salmonella genomic island 1 (SGI1) (D. A. Boyd,
G. A. Peters, L.-K. Ng, and M. R. Mulvey, FEMS Microbiol.
Lett. 189:285-291, 2000), which harbors the genes associated with the
ACSSuT phenotype in a Canadian isolate of Salmonella
enterica serovar Typhimurium DT104. A 43-kb region has been
completely sequenced and found to contain 44 predicted open reading
frames (ORFs) which comprised ~87% of the total sequence. Fifteen
ORFs did not show any significant homology to known gene sequences. A
number of ORFs show significant homology to plasmid-related genes,
suggesting, at least in part, a plasmid origin for the SGI1, although
some with homology to phage-related genes were identified. The SGI1 was
identified in a number of multidrug-resistant DT120 and S. enterica serovar Agona strains with similar antibiotic-resistant
phenotypes. The G+C content suggests a potential mosaic structure for
the SGI1. Emergence of the SGI1 in serovar Agona strains is discussed.
*
Corresponding author. Mailing address: Nosocomial
Infections, National Microbiology Laboratory, Health Canada, 1015 Arlington St., Winnipeg, Manitoba, Canada R3E 3R2. Phone: (204)
789-2133. Fax: (204) 789-2018. E-mail:
Michael_Mulvey{at}hc-sc.gc.ca.
Journal of Bacteriology, October 2001, p. 5725-5732, Vol. 183, No. 19
0021-9193/01/$04.00+0 DOI: 10.1128/JB.183.19.5725-5732.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
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