2020—2021年绍兴市水产品和腹泻患者来源的霍乱弧菌耐药性与分子特征分析
作者:
作者单位:

绍兴市疾病预防控制中心,浙江 绍兴 312000

作者简介:

陈吉铭 男 工程师 研究方向为食品微生物检验 E-mail:919737915@qq.com

通讯作者:

何琴芬 女 主管技师 研究方向为食品安全风险监测 E-mail:185449314@qq.com

中图分类号:

R155

基金项目:


Antibiotic resistance and molecular characteristics of Vibrio cholerae from aquatic products and diarrhea patients in Shaoxing from 2020 to 2021
Author:
Affiliation:

Shaoxing Center for Disease Control and Prevention, Zhejiang Shaoxing 312000, China

Fund Project:

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    摘要:

    目的 了解2020—2021年绍兴市霍乱弧菌的血清型、霍乱毒素编码基因(ctxAB)携带率、耐药性及分子分型情况。方法 收集2020—2021年分离自水产品、腹泻患者粪便的霍乱弧菌68株,使用玻片凝集法进行血清分型;利用实时荧光PCR检测ctxAB基因;采用微量肉汤稀释法和脉冲场凝胶电泳(PFGE)分别进行药物敏感试验和分子分型。结果 68株霍乱弧菌只有3株为O1群小川型,其余65株均为非O1/O139血清群;所有菌株均未检出ctxAB基因;菌株对头孢他啶、头孢他啶/阿维巴坦和复方新诺明的耐药率分别为45.6%、38.2%和36.8%,对四环素、替加环素、阿奇霉素、阿米卡星敏感,17株菌对3种及以上抗生素耐药;菌株经Not I酶切后的PFGE图谱呈多样性,水产品分离株与病例分离株的分子分型差别较大。结论 2020—2021年绍兴市霍乱弧菌主要为非O1/O139血清群,不携带毒力基因ctxAB,对多种抗生素耐药,分子特征复杂多样。

    Abstract:

    Objective To investigate the serotype, cholera toxin encoding gene (ctxAB) carying rate, antibiotic resistance and molecular typing of Vibrio cholerae in Shaoxing from 2020 to 2021.Methods Sixty-eight strains were isolated from aquatic products and feces of patients with diarrhea from 2020 to 2021, and serologically classified by glass agglutination method. The ctxAB gene was detected by real-time fluorescence polymerase chain reaction. Microbroth dilution method and pulsed field gel electrophoresis (PFGE) were used for antibiotic sensitivity test and molecular typing of strains, respectively.Results Only three of the 68 strains were O1 serotype Ogawa, and the other 65 strains were non-O1/O139 serogroup. All strains did not detected ctxAB gene. The antibiotic resistance rates to ceftazidime, ceftazidime/avibactam and cotrimoxazole were 45.6%, 38.2% and 36.8%, respectively. All strains were sensitive to tetracycline, tigecycline, azithromycin and amikacin, and 17 strains were resistant to 3 or more antibiotics. PFGE molecular typing of strains digested by Not I showed diversity, and there was a great difference between the aquatic product isolates and the case isolates.Conclusion The main serogroup of Vibrio cholerae was non-O1/O139 in Shaoxing from 2020 to 2021. The strains did not carry ctxAB gene and were resistant to multiple antibiotics. The molecular characteristics of strains were complex and diverse.

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陈吉铭,张琴超,陈金堃,唐诗洁,何琴芬.2020—2021年绍兴市水产品和腹泻患者来源的霍乱弧菌耐药性与分子特征分析[J].中国食品卫生杂志,2023,35(4):504-509.

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  • 收稿日期:2022-03-28
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  • 在线发布日期: 2023-07-03
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