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Volume 32, Number 10—October 2026

Research

Multiple Introductions and Cross-Sector Transmission of Salmonella enterica Serovar Infantis Carrying blaCTX-M-65 Gene, South Korea, 2022–2024

Eunkyung Shin1, Tae-Min La1, Jaeil Yoo, Sungsuck Oh, Juhee Kim, Junyoung Kim2, and Ji-Yeon Hyeon2Comments to Author 
Author affiliation: Division of Bacterial Diseases, Korea Diseases Control and Prevention Agency, Cheongju, South Korea (E. Shin, J. Yoo, Junyoung Kim); College of Veterinary Medicine, Konkuk University, Seoul, South Korea (T.-M. La, J.-Y. Hyeon); Division of Emerging Infectious Diseases, Incheon Metropolitan City Institute of Public Health and Environment, Incheon, South Korea (S. Oh, Juhee Kim)

Main Article

Figure 1

Maximum-likelihood phylogenetic tree for 102 isolates from study of multiple introductions and cross-sector transmission of Salmonella enterica serovar Infantis carrying blaCTX-M-65 gene, South Korea, 2022–2024. South Korea clades I and II were defined as the 2 major groups observed in the midpoint-rooted phylogeny. Antimicrobial resistance genes are annotated. Numbers at nodes indicate bootstrap support values >90%. Pairwise single-nucleotide polymorphism distances within and between clades are available in Appendix Figure 1. Scale bar indicates nucleotide substitutions per site.

Figure 1. Maximum-likelihood phylogenetic tree for 102 isolates from study of multiple introductions and cross-sector transmission of Salmonella enterica serovar Infantis carrying blaCTX-M-65 gene, South Korea, 2022–2024. South Korea clades I and II were defined as the 2 major groups observed in the midpoint-rooted phylogeny. Antimicrobial resistance genes are annotated. Numbers at nodes indicate bootstrap support values >90%. Pairwise single-nucleotide polymorphism distances within and between clades are available in Appendix Figure 1. Scale bar indicates nucleotide substitutions per site.

Main Article

1These first authors contributed equally to this article.

2These authors contributed equally to this article.

Page created: August 20, 2026
Page updated: September 16, 2026
Page reviewed: September 16, 2026
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