Can Zingiber officinale immunomodulation in Macrobrachium rosenbergii (de Man) against Vibrio alginolyticus?

The present study was investigated the protective efficacy of Zingiber officinale extract enriched diets at 0 g, 0.01 g, 0.1 g, and 1.0 g per kilogram in giant freshwater prawn, Macrobrachium rosenbergii (de Man) against Vibrio alginolyticus. The total hemocyes (THC) significantly increased in prawn fed at 0.1 g and 1.0 g diets on weeks 1 and 2 and all the doses of the diet on week 4 as compared with control against V. alginolyticus. The prophenoloxidase (proPO) activity significantly enhanced all doses of the diet during the experiment as compared to control. The respiratory burst (RB) activity significantly enhanced when prawns were received at 0.1 g and 1.0 g diets on first week and all the doses of the diet on fourth week. The superoxide dimutase (SOD) activity did not significant change between weeks 1 and 2, but it was enhanced on fourth week at 0.1 g and 1.0 g diets. The phogocytic activity was significantly enhanced in all the doses of the diet during the experiment. The clearance efficiency was significantly increased in 0.1 g and 1.0 g diets between weeks 1 and 2 and all the doses of the diet on week 4 as compared with control. The survival rate was 70% and 83% with 0.1 g and 1.0 g diets compared with 0.01 g diet in M. rosenbergii against V. alginolyticus. Therefore, this present results suggested that feed supplementation with Z. officinale positively modulate the immune system and protect M. rosenbergii from V. alginolyticus infection. Keywords: Macrobrachium rosenbergii; Non-specific immunity; Supplementation diet; Vibrio alginolyticus; Zingiber officinale