Effects of dietary on some specific and nonspecificimmunity in the common carp ( )Aloe veraCyprinus carpio

In this study, the immunostimulatory effect of dietary crude extract was investigated in Three hundred fish were randomly divided into four groups. The first group was immunized with bacterin (A.h) and was fed a diet contained 0.5% . The second group was immunized with A.h and fed a diet without. The third group was not immunized and fed with a diet that contained 0.5% . The fourth group remained as the control group and was neither immunized nor fed with supplements. Blood samples were taken every 14 d for eight weeks and samples were analyzed for hematological and immunological parameters. White blood count (WBC), red blood count (RBC), packed cell volume (PCV), lysozyme activity, serum bactericidal activity, complement activity, total protein, IgM concentration and specific antibody were assessed. At the end of treatment, 20 fish from each group were challenged with . WBC value, antibody level, lysozyme and bactericidal activity were significantly increased in the serum of fish treated with (p<0.05). No significant differences were seen in the RBC, PCV or complement activity among the groups. This study indicates that the oral administration of is able to enhance some specific and nonspecific immune responses in the common carp.

Keywords:

Al oe v er a Cy p r in u s c a r p ioAeromonas hydrophila. , , immu n o s t imu l a n t , l y s o z yme