Journal
JOURNAL OF BACTERIOLOGY
Volume 183, Issue 19, Pages 5725-5732Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JB.183.19.5725-5732.2001
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This study describes the characterization of the recently described Salmonella genomic island I (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 similar to 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.
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