Effect of dietary Lactobacillus casei and different levels of immunogen on the activities of immunological and hematological factors of Cyprinus carpio

The aim of this study was to evaluate the effects of synbiotic Lactobacillus casei PTCC 1608 and immunogen prebiotic on immunological and hematological factors of Cyprinus carpio. 300 fish (with the average weight of 40 g) were fed for 75 days with various diets including the diets containing 0.5 (A), 1 (B) and 1.5% (C) immunogen and L.casei probiotic with the concentration of 5×107 CFU/g, treatment D contained only L.casei probiotic with the concentration of 5×107 CFU/g and the control treatment without synbiotic (E). Results showed that the levels of white blood cells in the treatment A, B and C on day 60 were significantly different as compared to day 0 and the control group (P