alexa Some medicinal plants as immunostimulant for fish


Journal of Vaccines & Vaccination

Author(s): Sheyla Karata Dgenci

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Immunostimulant effects of the dietary intake of various medicinal plant extracts on fish, rainbow trout (Oncorhynchus mykiss), were investigated. For this purpose fish were fed with diets containing aqueous extracts of mistletoe (Viscum album), nettle (Urtica dioica), and ginger (Zingiber officinale). Food containing lyophilized extracts of these plants as 0.1 and 1% was used at a rate of 2% of body weight per day for three weeks. At the end of the experimental period, various parameters of non-specific defence mechanisms, including extracellular and intracellular respiratory burst activities, phagocytosis in blood leukocytes and total plasma protein level were examined. Specific growth rates (SGRs) and condition factors (CFs) of the fish were also measured. Plant materials tested for immunostimulatory food additives caused an enhanced extracellular respiratory burst activity (P<0.001) compared to the control group. Especially the rainbow trout fed with a diet containing 1% aqueous extract of powdered ginger roots for three weeks exhibited a significant non-specific immune response. Phagocytosis and extracellular burst activity of blood leukocytes were significantly higher in this group than those in the control group. All plant extracts added to fish diet increased the total protein level in plasma except 0.1% ginger. The highest level of plasma proteins was observed in the group fed with 1% ginger extract containing feed.

This article was published in J Ethnopharmacol. and referenced in Journal of Vaccines & Vaccination

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