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- Title
Antimicrobial potential of Ericaria selaginoides extracts against Listeria monocytogenes in "mató", a Catalan fresh cheese.
- Authors
Rubiño, S.; Aymerich, T.; Peteiro, C.; Bover-Cid, S.; Hortós, M.
- Abstract
The objective of this work was to assess the antimicrobial effect of crude extracts and non-polar and mid-polar subfractions of the brown macroalga Ericaria selaginoides, using a mid-polarity extraction medium. The activity was evaluated through challenge testing against Listeria monocytogenes in Catalan "mató" (fresh cheese) selected as a food matrix. Three concentrations were tested, representing 2 ×, 4 × and 10 × Minimum Bactericidal Concentration values obtained for crude extract in previous in vitro assays. Ericaria selaginoides extracts inhibited L. monocytogenes growth in a dose-dependent manner. Intermediate concentrations of the three extracts were able to notably reduce the growth rate of the pathogen. Highest concentration of crude extract and non-polar subfraction were able to completely inhibit the growth of L. monocytogenes during the 10 days of storage at 8 °C. Moreover, a slight listericidal effect was observed in presence of the non-polar subfraction, reducing the L. monocytogenes level by ca. 3 log after 10 days of refrigerated storage. These results prove the potential of E. selaginoides extracts as a source of valuable antimicrobial compounds that can be used as natural food ingredients to develop safer fresh dairy food.
- Publication
Journal of Applied Phycology, 2023, Vol 35, Issue 2, p949
- ISSN
0921-8971
- Publication type
Article
- DOI
10.1007/s10811-023-02923-2