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Inactivation of two Mycobacteria by free chlorine: Effectiveness, influencing factors, and mechanisms

机译：通过自由氯灭活两种分枝杆菌：有效性，影响因素和机制

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摘要

Chlorination is one of the most widely used disinfection techniques, and the problem of "chlorine-resistant bacteria" (CRB) has attracted more attention recently. In this study, the deactivation of typical CRB in water, Mycobacterium fortuitum (M. fortuitum) and Mycobacterium mucogenicum (M. mucogeniaim), by free chlorine was investigated with Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis) as the reference. The chlorination effectiveness of chlorine on M. fortuitum and M. mucogenicum and the effect of chlorine concentration, pH, and humic acid were studied. It was found that M. mucogenicum was more resistant to chlorine than M. fortuitum, both of which were much more resistant than E. cob and B. subtilis. The effect of disinfectant concentration on the inactivation efficiency was positive, whereas the influence of pH and humic acid was negative. The inactivation mechanisms were explored by analyzing the bacteria morphology, the destruction of cell membrane, the cell hydrophobicity, as well as total adenosine triphosphate (ATP), superoxide dismutase (SOD) activity. The slight destruction of the cell membrane was observed after deactivation with chlorine, and high hydrophobicity of the cell membrane combined with metabolic changes might lead to the chlorine tolerance of Mycobacteria. (C) 2018 Elsevier B.V. All rights reserved.
机译：氯化是最广泛使用的消毒技术之一，“抗氯细菌”（CRB）的问题最近引起了更多的关注。在本研究中，用大肠杆菌（大肠杆菌）和枯草芽孢杆菌（B.枯草芽孢杆菌（B.枯草芽孢杆菌（B.枯草芽孢杆菌）研究了水中的典型CRB在水中的典型CRB，分枝杆菌（Forcuitum）和粘膜粘膜粘膜粘膜粘菌（MucogeniaIm），作为参考资料。研究了氯对氯化氯的氯化效果。研究了粘菌和霉菌，pH和腐殖酸的影响。结果发现，M uCucogencum含有比M. Fortueum更抗氯，两者都比玉米棒和B.枯草芽孢杆菌更耐受。消毒剂浓度对灭活效率的影响是阳性的，而pH和腐殖酸的影响是阴性的。通过分析细菌形态，细胞膜破坏，细胞疏水性以及总腺苷三磷酸（ATP），超氧化物歧化酶（SOD）活性来探索灭活机制。用氯去激活后观察细胞膜的轻微破坏，细胞膜的高疏水性联合代谢变化可能导致分枝杆菌的氯耐受性。 （c）2018年elestvier b.v.保留所有权利。

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  • 来源
    《The Science of the Total Environment》 |2019年第838期|271-284|共14页
  • 作者

    Wang Jingyu; Sui Minghao; Yuan Bojie; Li Hongwei; Lu Hongtao;

  • 作者单位

    Tongji Univ Sch Environm Sci & Engn Shanghai Inst Pollut Control & Ecol Secur State Key Lab Pollut Control & Resource Reuse 1239 Siping Rd Shanghai 200092 Peoples R China;

    Tongji Univ Sch Environm Sci & Engn Shanghai Inst Pollut Control & Ecol Secur State Key Lab Pollut Control & Resource Reuse 1239 Siping Rd Shanghai 200092 Peoples R China;

    Tongji Univ Sch Environm Sci & Engn Shanghai Inst Pollut Control & Ecol Secur State Key Lab Pollut Control & Resource Reuse 1239 Siping Rd Shanghai 200092 Peoples R China;

    Tongji Univ Sch Environm Sci & Engn Shanghai Inst Pollut Control & Ecol Secur State Key Lab Pollut Control & Resource Reuse 1239 Siping Rd Shanghai 200092 Peoples R China;

    Tongji Univ Sch Environm Sci & Engn Shanghai Inst Pollut Control & Ecol Secur State Key Lab Pollut Control & Resource Reuse 1239 Siping Rd Shanghai 200092 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Chlorination; Chlorine-resistant bacteria; mycobacteriurm fortuitum; Mycobacterium mucogenicum; Mechanism;

    机译：氯化;抗氯细菌;霉菌Fortuitum;粘膜粘膜粘膜;机制;

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