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首页> 外文期刊>Food microbiology >Temperate and virulent Lactobacillus delbrueckii bacteriophages: Comparison of their thermal and chemical resistance
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Temperate and virulent Lactobacillus delbrueckii bacteriophages: Comparison of their thermal and chemical resistance

机译：温和强力德氏乳杆菌噬菌体：耐热和耐化学性的比较

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摘要

The aim of this work was to study the efficiency of diverse chemical and thermal treatments usually used in dairy industries to control the number of virulent and temperate Lactobacillus delbrueckii bacteriophages. Two temperate (Cb1/204 and Cb1/342) and three virulent (BYM, YAB and Ib3) phages were studied. The thermal treatments applied were: 63 ℃ for 30 min (low temperature - long time, LTLT), 72 ℃ for 15 s (high temperature - short time, HTST), 82 ℃ for 5 min (milk destined to yogurt elaboration) and 90 ℃ for 15 min (FIL-IDF). The chemical agents studied were: sodium hypochlorite, ethanol, isopropanol, peracetic acid, biocides A (quaternary ammonium chloride), B (hydrogen peroxide, peracetic acid and peroctanoic acid), C (alkaline chloride foam), D (p-toluensulfonchloroamide, sodium salt) and E (ethoxylated nonylphenol and phosphoric acid). The kinetics of inactivation were drew and T_(99) (time necessary to eliminate the 99% of phage particles) calculated. Results obtained showed that temperate phages revealed lower resistance than the virulent ones to the treatment temperatures. Biocides A, C, E and peracetic acid showed a notable efficiency to inactivate high concentrations of temperate and virulent L. delbrueckii phages. Biocide B evidenced, in general, a good capacity to eliminate the phage particles. Particularly for this biocide virulent phage Ib3 showed the highest resistance in comparison to the rest of temperate and virulent ones. On the contrary, biocide D and isopropanol presented a very low capacity to inactivate all phages studied. The efficiency of ethanol and hypochlorite was variable depending to the phages considered. These results allow a better knowledge and give useful information to outline more effective treatments to reduce the phage infections in dairy plants.
机译：这项工作的目的是研究通常用于乳品工业中的多种化学和热处理方法的效率，以控制有毒和温带的德氏乳杆菌噬菌体的数量。研究了两个温带（Cb1 / 204和Cb1 / 342）和三个强毒（BYM，YAB和Ib3）噬菌体。进行的热处理为：63℃30分钟（低温-长时间，LTLT），72℃15秒（高温-短时间，HTST），82℃5分钟（用于精制酸奶的牛奶）和90保持15分钟（FIL-IDF）。研究的化学试剂为：次氯酸钠，乙醇，异丙醇，过氧乙酸，杀生物剂A（氯化季铵），B（过氧化氢，过氧乙酸和过辛酸），C（氯化碱泡沫），D（对甲苯磺酰氯酰胺，钠盐）和E（乙氧基化壬基酚和磷酸）。绘制失活动力学并计算T_（99）（消除99％噬菌体颗粒所需的时间）。获得的结果表明，温和的噬菌体显示出比毒性的噬菌体对处理温度的抵抗力低。杀生物剂A，C，E和过氧乙酸具有显着的灭活高浓度温和和有毒力的德氏乳杆菌噬菌体的效率。通常，杀生物剂B证明具有消除噬菌体颗粒的良好能力。特别是对于这种杀生物剂，与其余的温和和强毒噬菌体相比，强毒噬菌体Ib3表现出最高的抗性。相反，杀生物剂D和异丙醇灭活所有噬菌体的能力非常低。乙醇和次氯酸盐的效率因所考虑的噬菌体而异。这些结果提供了更好的知识并提供了有用的信息，以概述减少乳制品中噬菌体感染的更有效的治疗方法。

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  • 来源
    《Food microbiology》 |2010年第4期|p.515-520|共6页
  • 作者

    Ana C. Ebrecht; Daniela M. Guglielmotti; Gustavo Tremmel; Jorge A. Reinheimer; Viviana B. Suarez;

  • 作者单位

    Instituto de Lactologia Industrial, (Universidad National del Litoral - CONICET), 1° de Mayo 3250, S3000AOM Santa Fe, Argentina;

    Instituto de Lactologia Industrial, (Universidad National del Litoral - CONICET), 1° de Mayo 3250, S3000AOM Santa Fe, Argentina;

    Instituto de Lactologia Industrial, (Universidad National del Litoral - CONICET), 1° de Mayo 3250, S3000AOM Santa Fe, Argentina;

    Instituto de Lactologia Industrial, (Universidad National del Litoral - CONICET), 1° de Mayo 3250, S3000AOM Santa Fe, Argentina;

    Instituto de Lactologia Industrial, (Universidad National del Litoral - CONICET), 1° de Mayo 3250, S3000AOM Santa Fe, Argentina;

  • 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

    lactobacillus delbrueckii; lactic acid bacteria; bacteriophages; chemical and thermal treatments;

    机译：德氏乳杆菌;乳酸菌噬菌体化学和热处理;

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