China CDC weekly · 2026
A Foodborne Outbreak Caused by ST8(CC8)-spa t024 Methicillin-Sensitive Staphylococcus aureus Harboring sea, seq, and sek - Taizhou City, Zhejiang Province, China, February 2025.
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Shen Weiwei, Wei Xiaoyue, Hu Haiyan, Zhu Guiwei, Sheng Ying, Wang Ning, Pang Tianlan, Wang Luwei, Wang Lingbo, Zhan Li, Yang Zhangnyu, Yan Xiaomei, Lin Haijiang
Аннотация
WHAT IS ALREADY KNOWN ABOUT THIS TOPIC?: The Staphylococcus aureus (S. aureus) sequence type 8 (ST8) clone has emerged as a dominant epidemic clone strongly associated with community-associated methicillin-resistant S. aureus (CA-MRSA) infections worldwide. However, documentation of this clone in China remains sparse.
WHAT IS ADDED BY THIS REPORT?: This report documents the first staphylococcal food poisoning outbreak in Zhejiang Province, China, caused by methicillin-susceptible S. aureus (MSSA) of the ST8 (CC8)-spa t024 lineage harboring enterotoxin genes sea, seq, and sek. Whole-genome phylogenetic analysis revealed that the outbreak strains belonged to a distinct evolutionary subclade (Clade II.1). These strains demonstrated close genetic relatedness to previously reported European lineages.
WHAT ARE THE IMPLICATIONS FOR PUBLIC HEALTH PRACTICE?: The identification of the ST8-spa t024 MSSA strain carrying sea, seq, and sek genes underscores the substantial public health risk in China. This finding highlights the emerging threat of foodborne illnesses caused by novel or under-recognized S. aureus ST8 strains and emphasizes the urgent need for enhanced surveillance of CA-S. aureus among food handlers to prevent future outbreaks.
WHAT IS ADDED BY THIS REPORT?: This report documents the first staphylococcal food poisoning outbreak in Zhejiang Province, China, caused by methicillin-susceptible S. aureus (MSSA) of the ST8 (CC8)-spa t024 lineage harboring enterotoxin genes sea, seq, and sek. Whole-genome phylogenetic analysis revealed that the outbreak strains belonged to a distinct evolutionary subclade (Clade II.1). These strains demonstrated close genetic relatedness to previously reported European lineages.
WHAT ARE THE IMPLICATIONS FOR PUBLIC HEALTH PRACTICE?: The identification of the ST8-spa t024 MSSA strain carrying sea, seq, and sek genes underscores the substantial public health risk in China. This finding highlights the emerging threat of foodborne illnesses caused by novel or under-recognized S. aureus ST8 strains and emphasizes the urgent need for enhanced surveillance of CA-S. aureus among food handlers to prevent future outbreaks.