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Multidrug-resistant and epidemic clones of Escherichia coli from natural beds of Venus clam

机译：金星蛤天然床中大肠杆菌的多重耐药性和流行性克隆

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摘要

Epidemic Escherichia coli clones have been recovered in marine sediment along the coast of Marche, an Adriatic region in central Italy. In the present study, £ coli strains from the clam Chamelea gallina, sampled from seven natural beds in the same area, were detected. Selected £ coli isolates from all sampling sites were screened for antimicrobial susceptibility, genetic diversity and correlation. The majority (60%) belonged to phylogroups A or B1, 31% to the other groups (B2, C, D, E, F), 8% to cryptic clades, and 1% were untypable. Moreover, 33.3% of isolates were resistant to at least one drug and 11% were multidrug resistant (MDR). The most common resistance was to tetracycline, ampicillin, and streptomycin. No clonality was detected, but the strains' high genetic heterogeneity pointed at multiple sources of microbiological contamination. MLST analysis found potentially pathogenic and even epidemic MDR strains in clams collected in class A (ST746 and ST46) and class B (ST393, ST58 and ST131) areas, indicating that strains of clinical origin are detectable in clams. These data highlight that eating raw or lightly cooked clams may pose a health risk if purification is not performed or is ineffective.
机译：流行的大肠埃希氏菌克隆已在意大利中部亚得里亚海地区马尔凯海岸的海洋沉积物中回收。在本研究中，从同一地区的七个自然床中取样的蛤Cha（Chamelea gallina）的大肠杆菌菌株被检测到。从所有采样点选出的大肠杆菌分离物进行了抗生素敏感性，遗传多样性和相关性的筛选。大多数（60％）属于系统群A或B1，31％属于其他组（B2，C，D，E，F），8％属于隐秘进化枝，1％不可分。此外，有33.3％的分离株对至少一种药物有抗药性，有11％对多药耐药（MDR）。最常见的耐药是对四环素，氨苄青霉素和链霉素的耐药性。没有检测到克隆性，但是菌株的高遗传异质性指向多种微生物污染源。 MLST分析发现在甲类（ST746和ST46）和乙类（ST393，ST58和ST131）地区收集的蛤类中有潜在的致病性甚至流行性MDR菌株，表明在蛤中可检测到临床起源的菌株。这些数据突出表明，如果不进行纯化或无效，食用生的或轻度煮熟的蛤可能会危害健康。

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  • 来源
    《Food microbiology》 |2016年第10期|1-6|共6页
  • 作者

    C. Vignaroli; L. Di Sante; F. Leoni; S. Chierichetti; D. Ottaviani; B. Citterio; F. Biavasco;

  • 作者单位

    Dipartimento di Scienze della Vita e dell'Ambiente, Universita Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy,Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131 Ancona, Italy;

    Dipartimento di Scienze della Vita e dell'Ambiente, Universita Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy;

    Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche, Sezione di Ancona, Laboratorio Nazionale di Riferimento (LNR) per il Controllo delle Contaminazioni Batteriche dei Molluschi Bivalvi Vivi, Via Cupa di Posatora 3, 60126 Ancona, Italy;

    Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche, Sezione di Ancona, Laboratorio Nazionale di Riferimento (LNR) per il Controllo delle Contaminazioni Batteriche dei Molluschi Bivalvi Vivi, Via Cupa di Posatora 3, 60126 Ancona, Italy;

    Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche, Sezione di Ancona, Laboratorio Nazionale di Riferimento (LNR) per il Controllo delle Contaminazioni Batteriche dei Molluschi Bivalvi Vivi, Via Cupa di Posatora 3, 60126 Ancona, Italy;

    Dipartimento di Scienze Biomolecolari, sez. di Scienze Tossicologiche, Igienistiche e Ambientali, Universita di Urbino 'Carlo Bo', 61029 Urbino, Italy;

    Dipartimento di Scienze della Vita e dell'Ambiente, Universita Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Chamelea gallina; Escherichia coli; ST131 clone; Food safety;

    机译：Chamelea gallina;大肠杆菌;ST131克隆;食品安全;

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