Journal
FISH & SHELLFISH IMMUNOLOGY
Volume 45, Issue 1, Pages 27-32Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.fsi.2015.03.029
Keywords
Synbiotic; Rainbow trout; Innate immune response; Skin mucus; Bactericidal activity; Disease resistance
Funding
- Ministerio de Economia y Competitividad [AGL2011-30381-C03-01]
- Fundacion Seneca de la Region de Murcia (Grupo de Excelencia) [04538/GERM/06]
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The present study investigates the effects of dietary supplements of galactooligosaccharides (GOS), Pediococcus acidilactici and P. acidilactici GOS on innate immune response, skin mucus as well as disease resistance of rainbow trout (Oncorhynchus mykiss) fingerlings (15.04 +/- 0.52 g). After 8 weeks of feeding, several innate immune (lysozyme, alternative complement and respiratory burst activities) and skin mucus parameters (bactericidal activity against Streptococcus faecium, Streptococcus iniae, Serratia marcescens, Staphylococcus aureus and Escherichia coli and mucus protein content) were studied. The results indicated that the three supplemented diet significantly increased innate immune response and skin mucus parameters in rainbow trout. The highest innate immune response, skin mucus activity as well as protein level was observed in synbiotic fed fish. Furthermore, at the end of the feeding experiment, some fish were intraperitoneally injected with Streptococcus iniae to determine the disease resistance. The mortality of fingerlings fed supplemented diet was significantly lower than fish from control group being the lowest mortality recorded in synbiotic fed fish group. (C) 2015 Elsevier Ltd. All rights reserved.
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