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Effect of a multi-citrus extract-based feed additive on the survival of rainbow trout (Oncorhynchus mykiss) following challenge with Lactococcus garvieae.
Acta Vet Scand. 2020 Jul 01; 62(1):38.AV

Abstract

Growing global concerns about antibiotic resistance have generated a considerable interest in the search for alternative environmental-friendly approaches. This study was aimed to assess the antimicrobial activity of a multi-citrus extract-based feed additive (Biocitro®) against some fish pathogens, as well as evaluate its capacity to protect rainbow trout (Oncorhynchus mykiss) to lactococcosis. A broth dilution method was used to determine the minimum inhibitory concentration (MIC) of Biocitro®, and the results showed a strong antibacterial activity against Aeromonas salmonicida, Lactococcus garvieae and Yersinia ruckeri with MIC values of 2.0 µg/mL. Afterwards, rainbow trout juveniles were fed a Biocitro®-enriched diet (750 mg/kg feed) at a daily rate of 1.5% body weight for 4 weeks, then they were challenged with L. garvieae by the cohabitation method. At the end of the experimental period, fish treated with Biocitro® showed significantly (P < 0.001) improved protection against L. garvieae compared to control fish. Although further studies are needed to understand how Biocitro® increases rainbow trout resistance to L. garvieae, this feed additive could be considered as a useful alternative to chemotherapeutic treatment in aquaculture.

Authors+Show Affiliations

Department of Animal Pathology, Faculty of Veterinary Sciences, Universidad de Zaragoza, Saragossa, 50013, Spain. Department of Animal Health, Centro Veterinario de Diagnóstico e Investigación (CEVEDI), School of Veterinary Medicine, Universidad Nacional Autónoma de Nicaragua-León, León, Nicaragua.Department of Animal Pathology, Faculty of Veterinary Sciences, Universidad de Zaragoza, Saragossa, 50013, Spain.Catalan Institute for Water Research (ICRA), Girona, 17003, Spain. jlbalcazar@icra.cat. University of Girona, Girona, 17004, Spain. jlbalcazar@icra.cat.Department of Animal Pathology, Faculty of Veterinary Sciences, Universidad de Zaragoza, Saragossa, 50013, Spain.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32611367

Citation

Mora-Sánchez, Brenda, et al. "Effect of a Multi-citrus Extract-based Feed Additive On the Survival of Rainbow Trout (Oncorhynchus Mykiss) Following Challenge With Lactococcus Garvieae." Acta Veterinaria Scandinavica, vol. 62, no. 1, 2020, p. 38.
Mora-Sánchez B, Fuertes H, Balcázar JL, et al. Effect of a multi-citrus extract-based feed additive on the survival of rainbow trout (Oncorhynchus mykiss) following challenge with Lactococcus garvieae. Acta Vet Scand. 2020;62(1):38.
Mora-Sánchez, B., Fuertes, H., Balcázar, J. L., & Pérez-Sánchez, T. (2020). Effect of a multi-citrus extract-based feed additive on the survival of rainbow trout (Oncorhynchus mykiss) following challenge with Lactococcus garvieae. Acta Veterinaria Scandinavica, 62(1), 38. https://doi.org/10.1186/s13028-020-00536-0
Mora-Sánchez B, et al. Effect of a Multi-citrus Extract-based Feed Additive On the Survival of Rainbow Trout (Oncorhynchus Mykiss) Following Challenge With Lactococcus Garvieae. Acta Vet Scand. 2020 Jul 1;62(1):38. PubMed PMID: 32611367.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of a multi-citrus extract-based feed additive on the survival of rainbow trout (Oncorhynchus mykiss) following challenge with Lactococcus garvieae. AU - Mora-Sánchez,Brenda, AU - Fuertes,Héctor, AU - Balcázar,José Luis, AU - Pérez-Sánchez,Tania, Y1 - 2020/07/01/ PY - 2020/03/06/received PY - 2020/06/26/accepted PY - 2020/7/3/entrez PY - 2020/7/3/pubmed PY - 2020/10/30/medline KW - Antibacterial activity KW - Biocitro® KW - Feed additive KW - Fish bacterial pathogens KW - Rainbow trout SP - 38 EP - 38 JF - Acta veterinaria Scandinavica JO - Acta Vet Scand VL - 62 IS - 1 N2 - Growing global concerns about antibiotic resistance have generated a considerable interest in the search for alternative environmental-friendly approaches. This study was aimed to assess the antimicrobial activity of a multi-citrus extract-based feed additive (Biocitro®) against some fish pathogens, as well as evaluate its capacity to protect rainbow trout (Oncorhynchus mykiss) to lactococcosis. A broth dilution method was used to determine the minimum inhibitory concentration (MIC) of Biocitro®, and the results showed a strong antibacterial activity against Aeromonas salmonicida, Lactococcus garvieae and Yersinia ruckeri with MIC values of 2.0 µg/mL. Afterwards, rainbow trout juveniles were fed a Biocitro®-enriched diet (750 mg/kg feed) at a daily rate of 1.5% body weight for 4 weeks, then they were challenged with L. garvieae by the cohabitation method. At the end of the experimental period, fish treated with Biocitro® showed significantly (P < 0.001) improved protection against L. garvieae compared to control fish. Although further studies are needed to understand how Biocitro® increases rainbow trout resistance to L. garvieae, this feed additive could be considered as a useful alternative to chemotherapeutic treatment in aquaculture. SN - 1751-0147 UR - https://www.unboundmedicine.com/medline/citation/32611367/Effect_of_a_multi_citrus_extract_based_feed_additive_on_the_survival_of_rainbow_trout__Oncorhynchus_mykiss__following_challenge_with_Lactococcus_garvieae_ L2 - https://actavetscand.biomedcentral.com/articles/10.1186/s13028-020-00536-0 DB - PRIME DP - Unbound Medicine ER -