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

E. J. Nya, B. Austin

    Research output: Contribution to journalArticle

    57 Citations (Scopus)

    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. © 2011 Elsevier Ltd.

    Original languageEnglish
    Pages (from-to)845-850
    Number of pages6
    JournalFish and Shellfish Immunology
    Volume30
    Issue number3
    DOIs
    Publication statusPublished - Mar 2011

    Keywords

    • Aeromonas hydrophila
    • Immune defence mechanism
    • Immunity
    • Rainbow trout

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