August 22, 2025FoodsOpen Access

Antimicrobial Resistance of Salmonella and Characterization of Two Mcr-1-Harboring Isolates from Pork Products in Guangdong, China

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Investigation reveals high mcr-1-mediated colistin resistance in Salmonella from pork, indicating urgent surveillance needs.

High levels of antimicrobial resistance were observed in Salmonella isolates from pork, with 20.1% of samples testing positive for resistant strains.
Of the 92 Salmonella isolates, 90.2% showed high resistance to tetracycline and 58.7% exhibited multidrug resistance.
Genomic analysis identified complex resistance regions in two colistin-resistant Salmonella Kentucky isolates harboring mcr-1 on plasmids.
The emergence of transferable colistin resistance raises significant concerns for food safety and public health.

Mai et al. (2025) studied this question.

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