Isolation of Lactic Acid Bacteria (LAB) from salmonids for potential use as probiotics: in vitro assays and toxicity assessment of salmo trutta embryonated eggs
| dc.contributor.author | Vargas González, Augusto | |
| dc.contributor.author | Barajas Vélez, Miguel Ángel | |
| dc.contributor.author | Pérez Sánchez, Tania | |
| dc.contributor.department | Ciencias de la Salud | es_ES |
| dc.contributor.department | Osasun Zientziak | eu |
| dc.date.accessioned | 2024-04-17T15:40:15Z | |
| dc.date.available | 2024-04-17T15:40:15Z | |
| dc.date.issued | 2024 | |
| dc.date.updated | 2024-04-17T15:30:29Z | |
| dc.description.abstract | This research investigates the potential of lactic acid bacteria (LAB) from freshwater salmonids as prospective probiotics for application in aquaculture. LAB and pathogenic bacteria were obtained from mucus and tissues of Oncorhynchus mykiss and Salmo trutta from fish farms in northeast Spain that had not used antibiotics for the six months preceding the study. Isolates were identified using Gram staining and sequencing of 16S rRNA and ITS-1. To assess the safety of the LAB, antibiotic susceptibility tests (ASTs) against 23 antimicrobials were performed. In vitro antagonism assays were conducted to evaluate the inhibitory effects of living LAB using the agar diffusion test method and their metabolites using the agar well diffusion method. The assays targeted six specific pathogens: Aeromonas salmonicida subsp. salmonicida, Carnobacterium maltaromaticum, Vagococcus salmoninarum, Yersinia ruckeri, Lactococcus garvieae, and the marine pathogen Vibrio jasicida. Additionally, a toxicity assay was conducted on embryonic eggs of S. trutta. The ASTs on probiotic LAB candidates revealed varied responses to antimicrobials, but no resistance to oxytetracycline or florfenicol, which are two antibiotics commonly used in aquaculture, was detected. The in vitro assays indicate that LAB exhibit antagonistic effects against pathogens, primarily when directly stimulated by their presence. In applications involving embryonic eggs or larvae, certain live strains of LAB were found to have adverse effects, with some isolates resulting in higher mortality rates compared to the control group or other isolates. Furthermore, the potential pathogenicity of certain LAB strains, typically considered safe in salmonids, warrants deeper investigation. | en |
| dc.description.sponsorship | This research was conducted with internal funding provided by the research team members. Additionally, A.V.-G. acknowledges the support of a predoctoral grant from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 801586, managed by Campus Iberus/Universidad Pública de Navarra. | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.citation | Vargas-González, A., Barajas, M., Pérez-Sánchez, T. (2024) Isolation of Lactic Acid Bacteria (LAB) from salmonids for potential use as probiotics: in vitro assays and toxicity assessment of salmo trutta embryonated eggs. Animals, 14(2), 1-23. https://doi.org/10.3390/ani14020200. | en |
| dc.identifier.doi | 10.3390/ani14020200 | |
| dc.identifier.issn | 2076-2615 | |
| dc.identifier.uri | https://academica-e.unavarra.es/handle/2454/47980 | |
| dc.language.iso | eng | en |
| dc.publisher | MDPI | en |
| dc.relation.ispartof | Animals 2024, 14(2), 200 | en |
| dc.relation.projectID | info:eu-repo/grantAgreement/European Commission/Horizon 2020 Framework Programme/801586/ | |
| dc.relation.publisherversion | https://doi.org/10.3390/ani14020200 | |
| dc.rights | © 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license. | en |
| dc.rights.accessRights | info:eu-repo/semantics/openAccess | |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | Antagonistic assays | en |
| dc.subject | Antimicrobial resistance | en |
| dc.subject | Embryonated eggs | en |
| dc.subject | Fish pathogens | en |
| dc.subject | Lactic acid bacteria | en |
| dc.subject | Probiotics | en |
| dc.subject | Salmo trutta | en |
| dc.subject | Salmonids | en |
| dc.title | Isolation of Lactic Acid Bacteria (LAB) from salmonids for potential use as probiotics: in vitro assays and toxicity assessment of salmo trutta embryonated eggs | en |
| dc.type | info:eu-repo/semantics/article | |
| dc.type.version | info:eu-repo/semantics/publishedVersion | |
| dspace.entity.type | Publication | |
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