Rampanti Giorgia, Nikolovska Nedelkoska Daniela, Kalevska Tatjana, Stojanovska Tanja, Harasym Joanna, Cardinali Federica, Orkusz Agnieszka, Milanović Vesna, Garofalo Cristiana, Bonifazi Alessio, Aquilanti Lucia, Osimani Andrea
Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, via Brecce Bianche, 60131, Ancona, Italy.
University "St. Kliment Ohridski" - Bitola, Faculty of Technology and Technical Sciences, Dimitar Vlahov 57, 1400, Veles, North Macedonia.
Heliyon. 2024 Sep 6;10(17):e37548. doi: 10.1016/j.heliyon.2024.e37548. eCollection 2024 Sep 15.
Smoked bovine sausages, traditional meat products from the Balkan Peninsula, are rich in microbial diversity and represent potential sources of pro-technological microorganisms. This study aimed to characterize these sausages from three different producers collected in green markets of North Macedonia. The analyses included physico-chemical (proximate composition, pH, a), morpho-textural (color and texture), and microbiological assessments (viable plate counts). Moreover, an isolation campaign was conducted to identify and characterize pro-technological microorganisms. Significant variability was observed in moisture content (ranging from 33.70 to 48.61 %), hardness, and color among samples from different producers. Samples from producer 2 showed the lowest pH (mean ∼4.90) and the highest loads of lactic acid bacteria (up to ∼9 log cfu g). Coagulase-negative cocci ranged between 4.84 and 7.47 log cfu g. No potential pathogenic bacteria were detected. A total of 30 isolates, primarily , , and , were identified. Isolates of L. S7, S13, and S27 showed strong in-vitro acidification performance, together with the production of exopolysaccharides (EPS), and protease activity. isolates S1 and S2 exhibited protease and lipase activities, while isolates S21 and S28 showed notable lipase and protease activities, along with the production of EPS. Additionally, all isolates, except S2, showed nitrate reductase activity, one of the key features able to affect sausage color. These findings highlighted the pro-technological traits of these microbial isolates, suggesting their potential use as starter or adjunct cultures in the meat industry to enhance product quality and safety.
烟熏牛肉香肠是巴尔干半岛的传统肉类产品,微生物多样性丰富,是潜在的有益技术微生物来源。本研究旨在对从北马其顿绿色市场收集的来自三个不同生产商的这些香肠进行表征。分析包括物理化学(近似成分、pH值、a值)、形态质地(颜色和质地)和微生物评估(活菌平板计数)。此外,还开展了一项分离活动,以鉴定和表征有益技术微生物。不同生产商的样品在水分含量(范围为33.70%至48.61%)、硬度和颜色方面存在显著差异。生产商2的样品pH值最低(平均约4.90),乳酸菌负载量最高(高达约9 log cfu/g)。凝固酶阴性球菌在4.84至7.47 log cfu/g之间。未检测到潜在病原菌。共鉴定出30株分离株,主要是 、 和 。分离株L. S7、S13和S27表现出很强的体外酸化性能,同时产生胞外多糖(EPS)和蛋白酶活性。 分离株S1和S2表现出蛋白酶和脂肪酶活性,而分离株S21和S28表现出显著的脂肪酶和蛋白酶活性,同时产生EPS。此外,除S2外的所有 分离株均表现出硝酸还原酶活性,这是影响香肠颜色的关键特征之一。这些发现突出了这些微生物分离株的有益技术特性,表明它们有可能用作肉类行业的发酵剂或辅助培养物,以提高产品质量和安全性。