Detection and characterization of variant Salmonella genomic island 1s from Salmonella Derby isolates

Abstract

The purpose of this study is to investigate the distribution and structure of Salmonella genomic island 1 (SGI1) among Salmonella enterica serovar Derby isolates from swine and their rearing environment. Three variants of SGI1s, specifically SGI1-A, C, and I, were identified by PCR mapping. The results of macrorestriction analysis and DNA sequencing SGI1 flanking regions revealed that there are at least two genomic lineages of Derby strains bearing SGI1s.