The effect of the drug “Amiksyn” on the immune status of carp
The productivity of pond fish, in particular carp, largely depends on the intensity of use of aquatic bioresources. The aim of the study was to investigate the effect of “Amiksyn” on the immunological parameters of carp fish, namely: the number of T- and B-lymphocytes, immunoglobulins, the level of circulating immune complexes, lysozyme, phagocytic activity and bactericidal activity of serum. 10 fish were selected for hematological and biochemical studies. The research was conducted in the aquarium of the Department of Aquatic Bioresources of Stepan Gzhytskyi NUVMB Lviv. Fish were kept in the pool for 21 days to adapt to the new conditions, and at the beginning of the series of experiments were placed in aquariums with a volume of 200 liters. Aeration and mechanical filtration of water were provided in the tanks. The temperature during the experiments fluctuated slightly and was 18 ± 1.5 °C. The main hydrochemical parameters corresponded to fish farming standards. In order to adjust the immune response, and thus prevent possible manifestations of fish damage by pathogens, we studied the possibility of using the immunostimulant “Amiksyn”, which was used for 5 – 10 – 15 – 20 days and then dosing 5 – 10 – 15 mg/kg body weight Pisces. The use of “Amiksyn” at a dose of 10 mg/kg of fish weight four times during the fifteen-day period with an interval of 5 days provided a decrease in the number of T-lymphocytes by 9.1 % and B-lymphocytes by 23.0 %; caused the activation of non-specific resistance indicators, namely lysozyme activity increased by 28.7 %, phagocytic activity of leukocytes increased by 14.0 % and bactericidal activity of serum increased by 19.0 %. Therefore, to adjust the immune system and stimulate the metabolic processes of fish in order to prevent the negative effects of various pathogens, the most optimal dose was 10 mg/kg of fish weight within 15 days of use.
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