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首页> 外文期刊>Astrobiology >Characterization of Bacilli Isolated from the Confined Environments of the Antarctic Concordia Station and the International Space Station
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Characterization of Bacilli Isolated from the Confined Environments of the Antarctic Concordia Station and the International Space Station

机译：分离自南极康科迪亚站和国际空间站密闭环境中的芽孢杆菌的特征

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摘要

Bacillus and related genera comprise opportunist and pathogen species that can threaten the health of a crew in confined stations required for long-term missions. In this study, 43 Bacilli from confined environments, that is, the Antarctic Concordia station and the International Space Station, were characterized in terms of virulence and plasmid exchange potentials. No specific virulence feature, such as the production of toxins or unusual antibiotic resistance, was detected. Most of the strains exhibited small or large plasmids, or both, some of which were related to the replicons of the Bacillus anthracis pXO1 and pXO2 virulence elements. One conjugative element, the capacity to mobilize and retromobilize small plasmids, was detected in a Bacillus cereus sensu lato isolate. Six out of 25 tested strains acquired foreign DNA by conjugation. Extremophilic bacteria were identified and exhibited the ability to grow at high pH and salt concentrations or at low temperatures. Finally, the clonal dispersion of an opportunist isolate was demonstrated in the Concordia station. Taken together, these results suggest that the virulence potential of the Bacillus isolates in confined environments tends to be low but genetic transfers could contribute to its capacity to spread. Key Words: Bacillus—Confined environments—Plasmid—Conjugation— Oceanobacillus—Paenibacillus.
机译：芽孢杆菌和相关属包括机会主义者和病原体，它们可能威胁长期任务所需的密闭站人员的健康。在这项研究中，根据毒力和质粒交换潜力对43个来自密闭环境的芽孢杆菌进行了表征，即南极康科迪亚站和国际空间站。没有检测到特定的毒力特征，例如毒素的产生或异常的抗生素抗性。大多数菌株表现出小质粒或大质粒，或两者都有，其中一些与炭疽芽孢杆菌pXO1和pXO2毒力元件的复制子有关。在蜡样芽孢杆菌分离物中检测到一种结合元件，即动员和逆动小质粒的能力。 25个测试菌株中有6个通过结合获得了外源DNA。嗜热菌被鉴定出来，并表现出在高pH和高盐浓度或低温下生长的能力。最后，在协和站证实了机会主义者分离株的克隆分散。综上所述，这些结果表明，在密闭环境中，芽孢杆菌分离株的毒力潜力往往较低，但遗传转移可能有助于其传播能力。关键字：芽孢杆菌-密闭环境-质粒-共轭-海洋杆菌-芽孢杆菌。

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  • 来源
    《Astrobiology》 |2011年第4期|p.323-334|共12页
  • 作者

    Sophie Timmery; Xiaomin Hu; Jacques Mahillon;

  • 作者单位

    aboratory of Food and Environmental Microbiology, Universite catholique de Louvain, Louvain-la-Neuve, Belgium;

    State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China;

    aboratory of Food and Environmental Microbiology, Universite catholique de Louvain, Louvain-la-Neuve, Belgium;

  • 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
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