Safety and probiotic functionality of isolated goat milk lactic acid bacteria

Autor: Haíssa Roberta Cardarelli, José Honório Pereira Lopes Neto, Liliane Andrade da Silva
Rok vydání: 2019
Předmět:
Zdroj: Annals of Microbiology. 69:1497-1505
ISSN: 1869-2044
1590-4261
DOI: 10.1007/s13213-019-01533-z
Popis: Purpose Lactic acid bacteria (LAB) are traditionally employed in the food industry. LAB strains from goat milk may also present probiotic potential, and it is fundamental to study the safety and functionality aspects which are desirable for their use in food. The objective of this study was to verify the probiotic potential of lactic bacteria isolated from goat milk. Methods The presence of safety-related virulence factors (hemolytic activity, gelatinase production, coagulase, and sensitivity to antibiotics) as well as functionality (exopolysaccharide (EPS) production, proteolytic activity, autoaggregation, gas production, survival in the gastrointestinal tract, and antimicrobial activity against bacteria that impair oral health) were determined. Result The selected LAB strains are safe against the evaluated parameters and have characteristics of possible probiotic candidates. Especially L. plantarum (DF60Mi) and Lactococcus lactis (DF04Mi) have potential to be added to foods because they have better resistance to simulated gastrointestinal conditions. In addition, they are isolated with already proven antimicrobial activity against Listeria monocytogenes, an important food-borne pathogen. DF60Mi was able to produce EPS (exopolysaccharides). LS2 and DF4Mi strains, both Lactococcus lactis subsp. lactis, demonstrated antimicrobial activity against S. mutans ATCC 25175, a recurrent microorganism in oral pathologies, mainly caries. Conclusion This study provides subsidies for future exploration of the potentialities of these LAB strains for both the development of new functional foods and for application in oral health.
Databáze: OpenAIRE
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