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首页> 外文期刊>Food microbiology >Transfer, composition and technological characterization of the lactic acid bacterial populations of the wooden vats used to produce traditional stretched cheeses
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Transfer, composition and technological characterization of the lactic acid bacterial populations of the wooden vats used to produce traditional stretched cheeses

机译：用于生产传统拉伸奶酪的木桶中乳酸菌种群的转移，组成和技术表征

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摘要

The biofilms of 12 wooden vats used for the production of the traditional stretched cheeses Caciocavallo Palermitano and PDO Vastedda della valle del Belice were investigated. Salmonella spp. and Listeria monocytogenes were never detected. Total coliforms were at low numbers with Escherichia coli found only in three vats. Coagulase-positive staphylococci (CPS) were below the enumeration limit, whereas lactic acid bacteria (LAB) dominated the surfaces of all vats. In general, the dominance was showed by coccus LAB. Enterococci were estimated at high numbers, but usually between 1 and 2 Log cycles lower than other LAB. LAB populations were investigated at species and strain level and for their technological properties relevant in cheese production. Eighty-five strains were analysed by a polyphasic genetic approach and allotted into 16 species within the genera Enterococcus, Lactobacillus, Lactococcus, Leuco-nostoc, Pediococcus and Streptococcus. Enterococcus faecium was found in all wooden vats and the species most frequently isolated were Enterococcus faecalis, Lactococcus lactis, Leuconostoc mesenteroides, Pediococcus acidilactici and Streptococcus thermophilus. The study of the quantitative data on acidification rate, autolysis kinetics, diacetyl production, antibacterial compound generation and proteolysis by cluster and principal component analysis led to the identification of some strains with promising dairy characteristics. Interestingly, a consistent percentage of LAB was bacteriocin-like inhibitory substances (BLIS) producer. Thus, the microbial biofilms of the wooden vats analysed in this study might contribute actively to the stability of the final cheeses.
机译：调查了用于生产传统拉伸奶酪Caciocavallo Palermitano和PDO Vastedda della valle del Belice的12个木质大桶的生物膜。沙门氏菌从未检测到李斯特菌。大肠菌群总数很少，仅在三个大桶中发现了大肠埃希菌。凝固酶阳性葡萄球菌（CPS）低于计数极限，而乳酸菌（LAB）主导了所有大桶的表面。通常，球菌实验室显示了优势。估计肠球菌数量很高，但通常比其他LAB低1至2个对数周期。在物种和品系水平上对乳酸菌种群进行了调查，并研究了其与奶酪生产相关的技术特性。通过多相遗传方法分析了八十五株菌株，并将其分配到肠球菌，乳杆菌，乳球菌，白斑病菌，球菌和链球菌属中的16种。在所有的木桶中都发现了粪肠球菌，最常分离的物种是粪肠球菌，乳酸乳球菌，间肠十二指肠球菌，乳酸乳球菌和嗜热链球菌。通过聚类和主成分分析法对酸化率，自溶动力学，二乙酰生产，抗菌化合物生成和蛋白水解的定量数据进行研究，从而鉴定出了一些具有良好乳制品特性的菌株。有趣的是，LAB的百分比是类细菌素抑制物质（BLIS）的产生者。因此，在这项研究中分析的木桶中的微生物生物膜可能会为最终奶酪的稳定性做出积极贡献。

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  • 来源
    《Food microbiology》 |2015年第12期|31-41|共11页
  • 作者

    Maria Luisa Scatassa; Raimondo Gaglio; Giusi Macaluso; Nicola Francesca; Walter Randazzo; Cinzia Cardamone; Antonino Di Grigoli; Giancarlo Moschetti; Luca Settanni;

  • 作者单位

    Istituto Zooprofilattico Sperimentale della Sicilia 'Adelmo Mirri', Via G. Marinuzzi 3, 90129, Palermo, Italy;

    Dipartimento Scienze Agrarie e Forestali, Universita di Palermo, Viale delle Scienze 4, 90128, Palermo, Italy;

    Istituto Zooprofilattico Sperimentale della Sicilia 'Adelmo Mirri', Via G. Marinuzzi 3, 90129, Palermo, Italy;

    Dipartimento Scienze Agrarie e Forestali, Universita di Palermo, Viale delle Scienze 4, 90128, Palermo, Italy;

    Dipartimento Scienze Agrarie e Forestali, Universita di Palermo, Viale delle Scienze 4, 90128, Palermo, Italy;

    Istituto Zooprofilattico Sperimentale della Sicilia 'Adelmo Mirri', Via G. Marinuzzi 3, 90129, Palermo, Italy;

    Dipartimento Scienze Agrarie e Forestali, Universita di Palermo, Viale delle Scienze 4, 90128, Palermo, Italy;

    Dipartimento Scienze Agrarie e Forestali, Universita di Palermo, Viale delle Scienze 4, 90128, Palermo, Italy;

    Dipartimento Scienze Agrarie e Forestali, Universita di Palermo, Viale delle Scienze 4, 90128, Palermo, Italy;

  • 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

    Enterococci; Lactic acid bacteria; Raw milk; Technological screening; Traditional cheese; Wooden vat;

    机译：肠球菌;乳酸菌生乳技术筛选;传统奶酪;木桶;

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