A Food Poisoning Caused by ST7 Harboring Gene in Hainan Province, China

Overview

Journal Front Microbiol

Specialty Microbiology

Date 2023 Apr 3

PMID 37007521

Authors

Yahui Guo

Xiaojie Yu

Jixiao Wang

De Hua

Yuanhai You

Qingbo Wu

Qinglong Ji

Jianzhong Zhang

Liefei Li

Yuan Hu

Zhonghui Wu

Xiaoyue Wei

Lianqun Jin

Fanliang Meng

Yuhua Yang

Xiaofeng Hu

Lijin Long

Songnian Hu

Heyuan Qi

Juncai Ma

Wenwen Bei

Xiaomei Yan

Haibin Wang

Zilong He

Affiliations

Soon will be listed here.

Abstract

ST7 is highly prevalent in humans, pigs, as well as food in China; however, staphylococcal food poisoning (SFP) caused by this ST type has rarely been reported. On May 13, 2017, an SFP outbreak caused by ST7 strains occurred in two campuses of a kindergarten in Hainan Province, China. We investigated the genomic characteristics and phylogenetic analysis of ST7 SFP strains combined with the 91 ST7 food-borne strains from 12 provinces in China by performing whole-genome sequencing (WGS). There was clear phylogenetic clustering of seven SFP isolates. Six antibiotic genes including and were present in all SFP strains and also showed a higher prevalence rate in 91 food-borne strains. A multiple resistance plasmid pDC53285 was present in SFP strain DC53285. Among 27 enterotoxin genes, only and were found in all SFP strains. A ФSa3int prophage containing type A immune evasion cluster (, and ) was identified in SFP strain. In conclusion, we concluded that this SFP event was caused by the contamination of cakes with ST7 . This study indicated the potential risk of new emergencing ST7 clone for SFP.

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