A comprehensive review of regulatory mechanisms of novel enterotoxin genes in Staphylococcus aureus from meat sources
Clinical Snapshot
PICO Framework
| P — Population | Meat-derived Staphylococcus aureus isolates containing novel enterotoxin genes |
| I — Intervention | Molecular and multi-omics characterisation of novel enterotoxin genes (NEGs) |
| C — Comparator | Not applicable (descriptive review) |
| O — Outcomes | NEG classification, pathogenic mechanisms, regulatory networks, and geographical distribution patterns |
Bottom Line
This systematic review synthesises current knowledge of novel enterotoxin genes in meat-derived Staphylococcus aureus, revealing complex regulatory networks involving transcriptional control and environmental sensing. While the review provides valuable mechanistic insights into pathogenicity and geographical distribution patterns, methodological limitations include inadequate search strategy documentation and absence of quality assessment. The findings are relevant to food safety practice, particularly for meat industry contamination control and risk assessment. However, the acknowledged technical limitations and research gaps suggest that translation to specific clinical or regulatory recommendations requires further high-quality primary research. Australian food safety authorities should consider these mechanisms when updating surveillance protocols for staphylococcal contamination in meat products.
Key Findings
Effect Size: Not applicable (qualitative synthesis)
Primary Outcome: NEGs comprise superantigenic and tissue-targeting subgroups with complex regulatory networks
Nnt Or Sensitivity: Not applicable (mechanistic review)
Confidence Interval: Not reported
Clinical Application
High - findings inform existing food safety protocols and surveillance systems Highly relevant to Australian meat industry regulation, FSANZ guidelines, and public health surveillance of foodborne illness Food safety professionals, microbiologists, and clinicians dealing with staphylococcal food poisoning
Abstract
BACKGROUND AND AIMS: Meat-borne Staphylococcus aureus (S. aureus) remains a leading global foodborne pathogen harbouring novel enterotoxin genes (NEGs) encoding superantigenic toxins with conditionally enhanced pathogenicity, representing a critical food safety hazard. This review characterizes NEG features, pathogenic mechanisms, multi-layered regulatory networks, and identifies key research challenges. METHODS: We systematically searched PubMed, Embase and the Web of Science Core Collection to synthesize molecular and multi-omics evidence (ChIP-seq, RNA-seq, CRISPR-Cas9) characterizing NEG classification, pathogenic mechanisms, multi-level regulatory networks (transcriptional, post-translational, environmental), and geographical distribution patterns in meat-derived S. aureus. RESULTS: NEGs comprise superantigenic and tissue-targeting subgroups mediating pathogenicity via cytotoxicity, intestinal microenvironment disruption, and immune evasion. Regulation involves a complex network of Agr/σB/SarA/Rot-mediated transcriptional control, phosphorylation/lactylation modifications and environmental sensing, exhibiting marked geographical divergence. Current limitations include technical resolution constraints, insufficient physiological model fidelity and incomplete regulatory crosstalk elucidation. CONCLUSIONS: Future research should prioritize transcription factor interaction mechanisms, growth-toxin correlation prediction models and multi-omics-based network decipherment. This review provides a foundational framework for NEG research to inform food safety risk assessment and targeted contamination control strategies.
References
- 1.Guan, Z., Shi, Y., Tian, X., Jin, C., Guan, Z., & Guan, Z. (2026). A comprehensive review of regulatory mechanisms of novel enterotoxin genes in Staphylococcus aureus from meat sources. Annals of Medicine. https://doi.org/10.1080/07853890.2026.2628382
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