Epidemiological and molecular investigations of Salmonella isolated from duck farms in southwest and around area of Shandong, China

Song, Fahui; Li, Wei; Zhao, Xinyuan; Hou, Shaopeng; Wang, Yanjun; Wang, Shuyang; Gao, Jing; Chen, Xuesheng; Li, Jie; Zhang, Ruihua; Jiang, Shijin; Zhu, Yanli

doi:10.1016/j.micpath.2024.106816

Microbial Pathogenesis

2024

DOI: 10.1016/j.micpath.2024.106816

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Epidemiological and molecular investigations of Salmonella isolated from duck farms in southwest and around area of Shandong, China

Fahui Song,

Wei Li,

Xinyuan Zhao

et al.

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Antimicrobial Resistance Genes and Clonal Relationships of Duck-Derived Salmonella in Shandong Province, China in 2023

Lu,

Zheng,

et al. 2024

Microorganisms

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Salmonella is a major threat to both human and animal health. However, the diversity and antibiotic resistance of animal-derived Salmonella and their association with human infections remain largely unexplored. In this study, Salmonella strains were isolated, identified, and sequenced from dead embryos and cloacal swab samples obtained from 278 large-scale duck farms in 11 cities in Shandong Province. The results show that a total of 57 Salmonella strains were isolated, with the dominant sequence types (ST) being ST17 (15/57) and ST19 (9/57), while the dominant serotypes were S. Indiana (15/57) and S. Typhimurium (11/57). Furthermore, genomic analysis has revealed the presence of prevalent antibiotic resistance genes (ARGs), which are often associated with co-transfer mechanisms. Over 52.63% of the strains were observed to carry two or more ARGs, especially one Salmonella strain that carried twenty-eight distinct ARGs. Furthermore, core genome multilocus sequence typing analysis (cgMLST) indicated that the 57 Salmonella strains may have a close relationship, which could be clonally transmitted among different cities. The results demonstrated a close relationship between the Salmonella strains identified in diverse geographical regions, suggesting that these strains may have been widely disseminated through clonal transmission. The mutation analysis reveals significant mutations at parC (T57S), gyrA (S83F), parC (S80R), gyrA (D87N), and gyrA (S83Y). These findings emphasize the necessity for monitoring and controlling Salmonella infections in animals, as they may serve as a reservoir for ARGs with the potential to affect human health or even be the source of pathogens that infect humans.

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Antimicrobial Resistance Genes and Clonal Relationships of Duck-Derived Salmonella in Shandong Province, China in 2023

Lu,

Zheng,

et al. 2024

Microorganisms

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Epidemiological and molecular investigations of Salmonella isolated from duck farms in southwest and around area of Shandong, China

Cited by 1 publication

References 44 publications

Antimicrobial Resistance Genes and Clonal Relationships of Duck-Derived Salmonella in Shandong Province, China in 2023

Antimicrobial Resistance Genes and Clonal Relationships of Duck-Derived Salmonella in Shandong Province, China in 2023

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