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首页> 外文期刊>Food microbiology >Effect of pH on Thermoanaerobacterium thermosaccharolyticum DSM 571 growth, spore heat resistance and recovery
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Effect of pH on Thermoanaerobacterium thermosaccharolyticum DSM 571 growth, spore heat resistance and recovery

机译：pH对解热嗜热厌氧杆菌DSM 571生长，孢子耐热性和恢复的影响

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摘要

Thermophilic spore-forming bacteria are potential contaminants in several industrial sectors involving high temperatures (40-65 ℃) in the manufacturing process. Among those thermophilic spore-forming bacteria, Thermoanaerobacterium thermosaccharolyticum, called "the swelling canned food spoiler", has generated interest over the last decade in the food sector. The aim of this study was to investigate and to model pH effect on growth, heat resistance and recovery abilities after a heat-treatment of T. thermosaccharolyticum DSM 571. Growth and sporulation were conducted on reinforced dostridium media and liver broth respectively. The highest spore heat resistances and the greatest recovery ability after a heat-treatment were obtained at pH condition allowing maximal growth rate. Growth and sporulation boundaries were estimated, then models using growth limits as main parameters were extended to describe and quantify the effect of pH on recovery of injured spores after a heat-treatment. So, cardinal values were used as a single set of parameters to describe growth, sporulation and recovery abilities. Besides, this work suggests that T. thermosaccharolyticum preserve its ability for germination and outgrowth after a heat-treatment at a low pH where other high resistant spore-forming bacteria like Geobacillus stearothermophilus are unable to grow.
机译：嗜热孢子形成细菌是制造过程中涉及高温（40-65℃）的几个工业部门的潜在污染物。在那些形成嗜热孢子的细菌中，被称为“溶胀的罐装食品破坏器”的嗜热厌氧厌氧热细菌在食品领域引起了人们的兴趣。这项研究的目的是研究和模拟pH对热解糖热菌DSM 571的生长，耐热性和恢复能力的影响。分别在增强的Dostridium培养基和肝肉汤中进行生长和形成孢子。在允许最大生长速率的pH条件下，获得最高的孢子耐热性和热处理后的最大回收能力。估计生长和孢子形成边界，然后扩展使用生长极限作为主要参数的模型，以描述和量化热处理后pH对受伤孢子恢复的影响。因此，基数值被用作描述生长，孢子形成和恢复能力的单一参数。此外，这项工作表明，在低pH值进行热处理后，嗜热热解糖衣芽孢杆菌保留了其发芽和长出的能力，而其他高抗性的形成孢子的细菌如嗜热脂肪芽孢杆菌则无法生长。

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  • 来源
    《Food microbiology》 |2016年第5期|64-72|共9页
  • 作者

    Narjes Mtimet; Stephanie Guegan; Lucile Durand; Anne-Gabrielle Mathot; Laurent Venaille; Ivan Leguerinel; Louis Coroller; Olivier Couvert;

  • 作者单位

    Universite de Brest, EA3882, Laboratoire Universitaire de Biodiversite et Ecologie Microbienne, UMT14.01 SPORE-RISK, 6 rue de l'Universite, F-29334 Quimper, France,BONDUELLE, rue Nicolas Appert BP 30173, 59653 Villeneuve d'Ascq, France;

    Universite de Brest, EA3882, Laboratoire Universitaire de Biodiversite et Ecologie Microbienne, UMT14.01 SPORE-RISK, 6 rue de l'Universite, F-29334 Quimper, France;

    Universite de Brest, EA3882, Laboratoire Universitaire de Biodiversite et Ecologie Microbienne, UMT14.01 SPORE-RISK, 6 rue de l'Universite, F-29334 Quimper, France;

    Universite de Brest, EA3882, Laboratoire Universitaire de Biodiversite et Ecologie Microbienne, UMT14.01 SPORE-RISK, 6 rue de l'Universite, F-29334 Quimper, France;

    BONDUELLE, rue Nicolas Appert BP 30173, 59653 Villeneuve d'Ascq, France;

    Universite de Brest, EA3882, Laboratoire Universitaire de Biodiversite et Ecologie Microbienne, UMT14.01 SPORE-RISK, 6 rue de l'Universite, F-29334 Quimper, France;

    Universite de Brest, EA3882, Laboratoire Universitaire de Biodiversite et Ecologie Microbienne, UMT14.01 SPORE-RISK, 6 rue de l'Universite, F-29334 Quimper, France;

    Universite de Brest, EA3882, Laboratoire Universitaire de Biodiversite et Ecologie Microbienne, UMT14.01 SPORE-RISK, 6 rue de l'Universite, F-29334 Quimper, France;

  • 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

    Thermoanaerobacterium thermosaccharolyticum; Growth cardinal values; Sporulation; Recovery; Heat-treatment; Modeling;

    机译：解热嗜热厌氧杆菌;增长基数;孢子形成;复苏;热处理;造型;

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