alexa Development of immunity in rainbow trout (Oncorhynchus mykiss, Walbaum) to Aeromonas hydrophila after the dietary application of garlic.
Agri and Aquaculture

Agri and Aquaculture

Journal of Aquaculture Research & Development

Author(s): Nya EJ, Austin B

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Abstract The development and duration of immune protection against Aeromonas hydrophila infections with garlic as an immunostimulant in rainbow trout Oncorhynchus mykiss was studied. Rainbow trout fingerlings of 14 g average weight were fed with 0 g (=Control), 0.5 g and 1.0 g of garlic 100 g(-1) of feed for 14 days. Physiological factors, biochemical, immunological, haematological parameters and electrolyte indices were evaluated after a further 14, 21 and 28 days before challenge with Aeromonas hydrophila. Fourteen days after the cessation of feeding with garlic, mortality rates of 12\% (relative percent survival [RPS] = 86\%) and 16\% (RPS = 80\%) were recorded in groups which received 0.5 g and 1.0 g of garlic 100 g(-1) of feed, respectively, compared to 84\% mortalities in the controls. The corresponding RPS 21 days after ending the feeding regime was 75\% and 68, respectively. One week later, the RPS had dropped to 55\% and 46\% in the groups fed with 0.5 g and 1.0 g garlic 100 g(-1) of feed, respectively. Copyright © 2011 Elsevier Ltd. All rights reserved. This article was published in Fish Shellfish Immunol and referenced in Journal of Aquaculture Research & Development

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