Title Page
Contents
ABSTRACT 8
Ⅰ. Introduction 10
Ⅱ. Material and Methods 13
2.1. Bacterial isolates 13
2.2. Whole-genome sequencing 13
Ⅲ. Results 15
3.1. Antimicrobial resistance genes 15
3.2. Mutations in the gyrA and acrB gene 15
3.3. Presence of plasmid replicons 15
3.4. Virulence genes 15
3.5. Phylogenetic analysis 16
Ⅳ. Discussion 21
Ⅴ. Conclusion 25
References 26
Abstract (in Korean) 29
〈Table 1〉 SE isolates used for whole-genome sequencing in this study (n=29) 17
〈Table 2〉 Antimicrobial resistance genes and chromosomal mutations of SE isolates in this study 18
〈Table 3〉 Plasmid replicons present in SE isolates in this study 19
〈Figure 1〉 Phylogenetic tree of 29 SE isolates using SNP analysis. 20