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首页> 外文期刊>African Journal of Biotechnology >Screening of autochthonous Lactobacillus species from Algerian raw goats milk for the production of bacteriocin-like compounds against Staphylococcus aureus
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Screening of autochthonous Lactobacillus species from Algerian raw goats milk for the production of bacteriocin-like compounds against Staphylococcus aureus

机译：从阿尔及利亚生山羊奶中筛选自生乳杆菌种以生产抗金黄色葡萄球菌的细菌素样化合物

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Lactic acid bacteria play a key role in maintaining the balance of normal gastro-intestinal microflora. Food contamination by?Staphylococcus aureus?is a major problem for consumer’s health in Algeria, especially during the summer period. The use of bacterial interactions is a new way to limit the pathogenic germs growth. Detection of antimicrobial substances produced by lactic acid bacteria against the undesirable germs is the objective of this work. Microbiological and biochemical methods were used to identify lactic acid bacteria having an antimicrobial activity. The 02 isolates of lactic acid bacteria obtained from raw goats’ milk in western Algeria areas were identified as:?Lactobacillus rhamnosus?and?Lactobacillus plantarum. The interactions study revealed that two lactobacilli species:?L. plantarum?(58) and?L. plantarum?(68) are able to inhibit?S. aureus’?growth. In mixed culture after 24 h,?L.plantarum?reduces the growth of?S. aureus?by 1.6 log and this latter bacteria was not found after 72 h. The various tests used revealed the proteinic nature of the substance, which was responsible of the growth inhibition of?S. aureus. The ecological adaptation and growth characteristics of cultures of?L.?plantarum?in food products will determine their effectiveness as biocontrol agent in dairy foods.
机译：乳酸菌在维持正常胃肠道菌群平衡中起关键作用。金黄色葡萄球菌对食品的污染是阿尔及利亚消费者健康的主要问题，尤其是在夏季。细菌相互作用的使用是限制病原菌生长的新方法。这项工作的目标是检测由乳酸菌产生的针对不良细菌的抗菌物质。微生物和生化方法被用来鉴定具有抗菌活性的乳酸菌。从阿尔及利亚西部地区的生山羊奶中分离出的02种乳酸菌被鉴定为：“鼠李糖乳杆菌”和“植物乳杆菌”。相互作用研究揭示了两种乳酸菌：？L。 Plantarum（58）和L。 a（68）能够抑制？S。金黄色葡萄球的生长。在24 h后的混合培养中，植物L.降低了S的生长。金黄色葡萄球菌以1.6 log记录，在72 h后未发现后者。所用的各种试验揭示了该物质的蛋白质性质，这是βS生长抑制的原因。金黄色的。食品中植物乳杆菌培养物的生态适应和生长特性将决定其作为乳制品生物防治剂的有效性。

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