Grujović Mirjana Ž, Marković Katarina G, Morais Susana, Semedo-Lemsaddek Teresa
Department of Science, Institute for Information Technologies, University of Kragujevac, Jovana Cvijića bb, 34 000 Kragujevac, Serbia.
CIISA-Center for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, 1300-477 Lisbon, Portugal.
Foods. 2024 Jun 28;13(13):2065. doi: 10.3390/foods13132065.
This study aimed to unleash the potential of indigenous lactic acid bacteria (LAB) originating from traditionally made Serbian goat cheese. Following the isolation and identification of the LAB, the safety aspects of the isolates were evaluated through tests for hemolytic activity and antibiotic sensitivity. The selected isolates were then tested for various technological properties, including growth in methylene blue, proteolytic activity, acidification, curd formation ability in both pure and enriched goat milk, diacetyl production, antagonistic potential against other LAB, and biofilm formation ability. The results indicated that spp., spp., and spp. did not exhibit α or β hemolysis, while enterococci displayed α hemolysis. A higher number of isolates demonstrated sensitivity to ampicillin, tetracycline, and streptomycin, while sensitivity to gentamicin and vancomycin was strain-dependent. Based on the evaluation of technological properties, M-1 and C7-7, C7-8, and C14-5 showed promising characteristics. Additionally, subsp. strains C0-14 and C21-8 emerged as promising candidates with notable technological properties. Notably, certain indigenous strains LAB exhibit promising technological properties and safety profiles. These characteristics make them suitable candidates for use as starter or adjunct cultures in goat's milk cheese production, potentially enhancing the quality and safety of the cheese as well as hygiene practices among small-scale dairy producers.
本研究旨在挖掘源自传统制作的塞尔维亚山羊奶酪的本土乳酸菌(LAB)的潜力。在分离和鉴定乳酸菌后,通过溶血活性测试和抗生素敏感性测试评估分离株的安全性。然后对所选分离株进行各种技术特性测试,包括在亚甲蓝中的生长情况、蛋白水解活性、酸化、在纯山羊奶和强化山羊奶中的凝乳形成能力、双乙酰生成、对其他乳酸菌的拮抗潜力以及生物膜形成能力。结果表明,[具体菌种1]属、[具体菌种2]属和[具体菌种3]属未表现出α或β溶血,而肠球菌表现出α溶血。更多的分离株对氨苄青霉素、四环素和链霉素敏感,而对庆大霉素和万古霉素的敏感性因菌株而异。基于技术特性评估,[菌株名称1] M-1和[菌株名称2] C7-7、C7-8以及C14-5表现出有前景的特性。此外,[具体亚种]菌株C0-14和C21-8作为具有显著技术特性的有前景候选菌株出现。值得注意的是,某些本土乳酸菌菌株表现出有前景的技术特性和安全概况。这些特性使其成为山羊奶酪生产中用作发酵剂或辅助发酵剂的合适候选菌株,有可能提高奶酪的质量和安全性以及小规模乳制品生产商的卫生实践水平。