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首页> 外文期刊>Food microbiology >Effect of speculation medium and its divalent cation content on the heat and high pressure resistance of Clostridium botulinum type E spores
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Effect of speculation medium and its divalent cation content on the heat and high pressure resistance of Clostridium botulinum type E spores

机译：投机介质及其二价阳离子含量对肉毒梭状芽孢杆菌E型孢子耐热高压的影响

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摘要

Clostridium (C.) botulinum type E belongs to the non-proteolytic physiological C botulinum group Ⅱ and produces the highly potent Botulinum neurotoxin E (BoNT/E) even at refrigerated temperatures. As C. botulinum type E spores are highly prevalent in aquatic environments, seafood and fishery products are commonly associated with this organism. Hydrostatic high pressure (HHP) treatments, or treatments combining HHP with elevated temperatures (HHPT), can be used to improve traditional preservation methods and increase food safety, quality and durability. In this study, we assessed the effect of different sporulation media and cation concentration on the heat resistance, HHP resistance, and HHPT resistance of spores from three C. botulinum type E strains. SFE (sediment fish extract) sporulation media yielded the most resistant spores, whereas, in M140 media, the least resistant spores were produced. Furthermore our results indicate that the divalent cation content (Ca~(2+), Mg~(2+) and Mn~(2+)) plays a role in the differential development of C. botulinum type E spore resistance to heat, HHP and HHPT in different media. Calcium cations confer heat and HPPT resistance to spores, while high amounts of magnesium cations appear to have a negative effect. Manganese cations in low concentrations are important for the development resistance to HPP and HPPT treatments, but not heat alone. This study provides valuable information on the nature of non-proteolytic C. botulinum type E spores grown in different media. The data provided here can be useful to the food industry and to researchers when considering spore properties in food safety risk assessment and the experimental design of future inactivation studies.
机译：E型肉毒梭菌属于非蛋白水解生理C型肉毒杆菌群Ⅱ，即使在冷藏温度下也能产生高效的肉毒杆菌神经毒素E（BoNT / E）。由于E型肉毒梭菌孢子在水生环境中非常普遍，因此海鲜和渔业产品通常与该生物体有关。静水高压（HHP）处理或将HHP与高温相结合（HHPT）的处理可用于改善传统的保鲜方法并提高食品安全性，质量和耐用性。在这项研究中，我们评估了不同的孢子形成介质和阳离子浓度对三种E型肉毒梭菌菌株的孢子的耐热性，HHP抗性和HHPT抗性的影响。 SFE（沉淀鱼提取物）的孢子形成培养基产生的抗药性最高的孢子，而在M140培养基中产生的抗药性最低的孢子。此外，我们的结果表明，二价阳离子含量（Ca〜（2 +），Mg〜（2+）和Mn〜（2+））在肉毒梭状芽孢杆菌E型芽孢耐热性，HHP的差异发育中起作用。和HHPT在不同的媒体中。钙阳离子赋予孢子耐热性和HPPT抵抗力，而大量的镁阳离子似乎具有负面作用。低浓度的锰阳离子对于抵抗HPP和HPPT处理的显影能力很重要，但并不单独加热。这项研究提供了有关在不同培养基中生长的非蛋白水解肉毒梭菌E型孢子性质的宝贵信息。在食品安全风险评估和未来灭活研究的实验设计中考虑孢子特性时，此处提供的数据对食品工业和研究人员有用。

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  • 来源
    《Food microbiology》 |2014年第12期|156-167|共12页
  • 作者

    Christian A. Lenz; Rudi F. Vogel;

  • 作者单位

    Lehrstuhl fue Technische Mikrobiologie, Technische Univenitaet Muenchen, D-85354 Freising, Germany;

    Lehrstuhl fue Technische Mikrobiologie, Technische Univenitaet Muenchen, D-85354 Freising, Germany,Technische Mikrobiologie, Technische Universitaet Muenchen, Gregor-Mendel-Str. 4, 85354 Freising, Germany;

  • 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

    Clostridium botulinum Type E; High pressure; Divalent cations; Ca~(2+); Mg~(2+) Mn~(2+); sporulation;

    机译：E型肉毒梭菌;高压力;二价阳离子;Ca〜（2+）;Mg〜（2+）Mn〜（2+）;孢子形成;

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