{"title":"Biological properties of L. helveticus strains","authors":"V. Leonova, A. Begunova","doi":"10.21603/1019-8946-2023-5-9","DOIUrl":null,"url":null,"abstract":"The biological properties of three strains of L. helvetcus were studied. All studied strains metabolize D-galactose. The L. helveticus AB strain utilizes D-glucose, D-fructose, N-acetylglucosamine, and D-trehalose; L. helveticus 20T — D-mannose, N-acetylglucosamine; L. helveticus H-9 — D-glucose, D-lactose, D-trehalose. All strains showed high β-galactosidase activity, as well as the activity of acid phosphatase, naphthol-AS-BI hydrolase, leucine arylamidase, and cystine arylamidase. For L. helveticus 20T and L. helveticus AB strains, valine arylamidase activity was found. All strains are sensitive to gentamicin, ampicillin, tetracycline, azithromycin, lincomycin, chloramphenicol. The data obtained indicate the safety of using strains as part of starter cultures and as producers of metabolite additives in terms of reducing the risk of spreading antibiotic resistance.","PeriodicalId":471429,"journal":{"name":"Молочная промышленность","volume":"52 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Молочная промышленность","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.21603/1019-8946-2023-5-9","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The biological properties of three strains of L. helvetcus were studied. All studied strains metabolize D-galactose. The L. helveticus AB strain utilizes D-glucose, D-fructose, N-acetylglucosamine, and D-trehalose; L. helveticus 20T — D-mannose, N-acetylglucosamine; L. helveticus H-9 — D-glucose, D-lactose, D-trehalose. All strains showed high β-galactosidase activity, as well as the activity of acid phosphatase, naphthol-AS-BI hydrolase, leucine arylamidase, and cystine arylamidase. For L. helveticus 20T and L. helveticus AB strains, valine arylamidase activity was found. All strains are sensitive to gentamicin, ampicillin, tetracycline, azithromycin, lincomycin, chloramphenicol. The data obtained indicate the safety of using strains as part of starter cultures and as producers of metabolite additives in terms of reducing the risk of spreading antibiotic resistance.
对3株helvetcus菌株的生物学特性进行了研究。所有被研究的菌株都代谢d -半乳糖。L. helveticus AB菌株利用d -葡萄糖、d -果糖、n -乙酰氨基葡萄糖和d -海藻糖;L. helveticus 20T - d -甘露糖，n -乙酰氨基葡萄糖;L. helveticus H-9 - d葡萄糖，d -乳糖，d -海藻糖。所有菌株均表现出较高的β-半乳糖苷酶活性，以及酸性磷酸酶、萘酚- as - bi水解酶、亮氨酸芳酰胺酶和胱氨酸芳酰胺酶活性。L. helveticus 20T和L. helveticus AB菌株均有缬氨酸芳酰胺酶活性。所有菌株对庆大霉素、氨苄西林、四环素、阿奇霉素、林可霉素、氯霉素敏感。所获得的数据表明，就降低抗生素耐药性传播的风险而言，将菌株用作发酵剂的一部分和代谢物添加剂的生产者是安全的。
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