江西省市售水产品中副溶血性弧菌的污染状况及耐药性和遗传特征分析
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江西省疾病预防控制中心

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Analysis of contamination,antimicrobial resistance and genetic characteristics of Vibrio parahaemolyticus isolated from aquatic products in Jiangxi Province
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Jiangxi Provincial Center for Disease Control and Prevention

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    摘要:

    目的 了解2023年江西省市售水产品中副溶血性弧菌的污染水平、耐药性及遗传特征情况。方法 2023年采集江西省市售的 212 份水产品,分析不同季度和不同种类副溶血性弧菌检出情况,并进行ST型、毒力基因、耐药基因和抗生素敏感性检测。 结果? 212份样品共分离出 45 株副溶血性弧菌,总检出率为 21.23 %。海水产品和淡水产品检出率为别为 26.67 % 和 15.89 %,检出率差异无统计学意义(χ2 = 3.682, P > 0.05)。第三季度检出率最高为22.62 %;甲壳类和贝类检出率最高,均为 25.00 %。45 株分离菌株共发现 40 个STs,其中 17 个为新发现STs,无优势STs。cgMLST系统发育分析表明 45 株分离菌株亲缘关系较远。45株分离菌株均携带率tlh 和T3SS1基因,仅 2 株分离菌株携带了trh基因,未检测到tdh和T3SS2基因。45 株分离菌株对头孢唑啉(100.00 %)和多黏菌素 E(51.11 %)具有高耐药性,存在多重耐药菌株。共检测到 13 种耐药基因,分别为CARB-20、tet(35)、sul1、sul2、dfrA6、CRP、QnrS2、ANT(2"")-Ia、ACC(6")-Ia和tet ( E ),耐药基因的携带与耐药表型不完全一致。 结论 江西省市售水产品中存在一定程度的副溶血性弧菌污染,副溶血性弧菌间遗传多样性丰富,亲缘关系较远,毒力基因携带率低,存在多重耐药菌株,耐药机制复杂,还有待进一步的研究。

    Abstract:

    Objective To analyze the contamination, drug resistance and genetic characteristics of Vibrio parahaemolyticus isolated from aquatic products in Jiangxi Province in 2023. Methods? A total of 212 aquatic products sold in Jiangxi Province in 2023 were collected, and the contamination of Vibrio parahaemolyticus in different seasons and different kinds was analyzed. The STs, virulence gene, resistance gene and antibiotic sensitivity of Vibrio parahaemolyticus were also detected. Results A total of 45 strains of Vibrio parahaemolyticus were detected from 212 samples with a detection rate of 21.23 %. The detection rate of Vibrio parahaemolyticus in marine products and freshwater products were 26.67 % and 15.89 %, respectively, while there was no significant difference in detection rate ( χ2 = 3.682, P > 0.05). The detection rate in the third quarter was highest (22.62 %). The detection rate in crustacea and shellfish were highest,both of which were 25.00 %. A total of 40 STs were found in 45 isolates, of which 17 were newly discovered STs, and no dominant STs were found.The phylogenetic analysis of cgMLST showed that the 45 isolates were distantly related. All 45 isolates carried tlh and T3SS1 genes, only 2 isolates carried trh gene, and tdh and T3SS2 genes were not detected.The 45 isolates presented highly resistant to cefazolin ( 100.00 % ) and polymyxin E ( 51.11 % ), and the multiple drug-resistant strains were found. A total of 13 drug resistance genes were detected, including CARB-20, tet(35), sul1, sul2, dfrA6, CRP, QnrS2, ANT(2")-Ia, ACC(6")-Ia and tet(E). The carrying of resistance genes is not completely consistent with the resistance phenotype. Conclusion The aquatic products sold in Jiangxi province were polluted by Vibrio parahaemolyticus at a certain degree. TheVibrio parahaemolyticus strains has rich genetic diversity and presented a distantly related. The carrying rate of virulence gene was low. The multiple drug-resistant strains were found, and the drug resistance mechanism needed to further studied because of its complexity.

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  • 收稿日期:2024-07-01
  • 最后修改日期:2024-09-02
  • 录用日期:2024-09-12
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