Staphylococcal food poisoning (SFP) is one of the most common foodborne diseases in the world. This study aimed to investigate the molecular epidemiological characteristics of isolated from SFP. A total of 103 isolates were obtained during 2011-2022 in Sichuan, southwest China. All isolates were tested for the genomic characteristics and phylogenetic analysis by performing whole-genome sequencing. Multilocus sequence typing analysis showed 17 multilocus sequence types (STs), ST7 (23.30%), ST5 (22.33%), and ST6 (16.50%) being the most common. A total of 45 virulence genes were detected, 22 of which were staphylococcal enterotoxin (SE) genes. Among the identified SE genes, exhibited the highest prevalence (86.4%). All isolates carried at least one SE gene. The results of the antimicrobial resistance (AMR) gene detection revealed 41 AMR genes of 12 classes. β-lactam resistance genes (, , ) and tetracycline resistance gene () exhibited a higher prevalence rate. Core genome single nucleotide polymorphism showed phylogenetic clustering of the isolates with the same region, year, and ST. The results indicated that the SFP isolates in southwest of China harbored multiple toxin and resistance genes, with a high prevalence of new SEs. Therefore, it is important to monitor the antimicrobial susceptibility and SE of to reduce the potential risks to public health.
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