Evaluation of Prebiotic and Probiotic Effects on the Intestinal Gut Microbiota and Histology of Atlantic salmon (Salmo salar L.)
- *Corresponding Author:
- Daniel L. Merrifield
Aquaculture and Fish Nutrition Research Group
School of Biomedical and Biological Sciences
The University of Plymouth, UK
Tel: + 44 1752 584 888
Fax: + 44 1752 584 950
E-mail: [email protected]
Received Date: August 02, 2011; Accepted Date: October 15, 2011; Published Date: October 25, 2011
Citation: Kristiansen M, Merrifield DL, Vecino JLG, Myklebust R, Ringø E (2011) Evaluation of Prebiotic and Probiotic Effects on the Intestinal Gut Microbiota and Histology of Atlantic salmon (Salmo salar L.) J Aquac Res Development S1:009. doi:10.4172/2155-9546.S1-009
Copyright: © 2011 Kristiansen M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
In the present study the impact on gut microbiology and indigenous gut histology of Atlantic salmon ( Salmo salar L.) was investigated following feeding of a control and a prebiotic (EWOS prebiosal ® ) diet and ex vivo exposure to saline or the probiotic bacterium Carnobacterium divergen s. The results showed that ex vivo exposure of C. divergens at 10 8 CFU ml -1 did not cause cell damage to the intestine tract of Atlantic salmon. Furthermore, prior provision of dietary prebiotic elevated the ability of C. divergens to adhere to the epithelium or mucus layer in the proximal intestine, where culturable heterotrophic bacterial levels (which were identified as C. divergens ) were elevated by 234% compared to the control. This effect was not apparent in the distal intestine. The ability of isolated carnobacteria from the ex vivo experiment to inhibit growth of two fish pathogenic bacteria ( Yersinia rückeri and Aeromonas salmonicida ssp. salmonicida ) was assessed. Extracellular products from all 11 of the isolated carnobacteria strains, plus the type strain Carnobacterium inhibens CCUG 31728, inhibited the in vitro growth of Y. rückeri . However, only extracellular products from C. divergens isolate 57 inhibited the growth of A. salmonicida ssp. salmonicida .