Antimicrobial resistance analyses of diarrheagenic Escherichia coli in commercially available frozen poultry and livestock meat and their products in Zhangzhou City of Fujian Province
10.19428/j.cnki.sjpm.2026.250385
- VernacularTitle:福建省漳州市市售冷冻禽畜肉及其制品致泻性大肠埃希菌耐药分析
- Author:
Shuping HONG
1
;
Jinzhong CHEN
1
;
Ling ZHONG
1
;
Yaling ZHENG
1
Author Information
1. Zhangzhou Center for Disease Control and Prevention, Zhangzhou, Fujian 363000, China
- Publication Type:Journal Article
- Keywords:
frozen poultry and livestock meat and their product;
diarrheagenic Escherichia coli;
food safety;
drug resistance
- From:
Shanghai Journal of Preventive Medicine
2026;38(8):604-609
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo investigate the contamination status and drug resistance of diarrheagenic Escherichia coli (DEC) in commercially available frozen poultry and livestock meat and their products in Zhangzhou City, and to provide a reference basis for the prevention and control of foodborne diseases caused by DEC. MethodsIn 2024, a total of 240 samples of frozen poultry and livestock meat and their products were collected from supermarkets, farmers’ markets, and online stores. Isolation, identification, and drug resistance analyses of DEC were conducted. ResultsAmong the 240 samples, 42 samples tested positive for DEC, with a detection rate of 17.50%. Specifically, the DEC detection rate in frozen poultry meat and its products （21.15%） was significantly higher than that in frozen livestock meat and its products （10.71%） (χ2=4.122, P=0.042); the detection rate in the first and fourth quarters （26.67%） was higher than that in the second and third quarters （8.33%） (χ2=13.968, P=0.003). A total of 44 DEC strains were isolated, among which enteroaggregative Escherichia coli (EAEC) was the dominant pathotype, accounting for 90.91%, and mainly carried the astA gene, followed by the pic gene. At a distance level of 10 000 in matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS) cluster analysis, the 44 DEC strains were divided into 2 major clusters, with 29 strains in Cluster Ⅰ and 15 strains in Cluster Ⅱ； at a distance level of 200, the strains could be classified into 12 types, with type c being the dominant one (27.27%). Among the 44 DEC strains, 37 DEC strains showed different degrees of resistance to 11 categories of antibiotics, 36 strains were resistant to 3 or more classes of antibiotics, with multidrug-resistant strains accounting for 81.82%, and 21 strains were resistant to more than 7 types of antibiotics. ConclusionThe detection rate of DEC in commercially available frozen poultry and livestock meat and their products in Zhangzhou City is relatively high, and the prevalence of multidrug resistance is severe. These findings should warrant the attention of relevant authorities, to strengthen food safety supervision and the management of antibiotic use, and enhance public health education to reduce the risk of foodborne diseases caused by DEC contamination.
