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Effect of Withania Somnifera (L. Dunal) Root as a Feed Additive on Immunological Parameters and Disease Resistance to Aeromonas Hydrophila in Labeo Rohita (Hamilton) Fingerlings

Ashwagandha is an exotic Indian herb which has remarkable stress-relieving properties. In addition to its excellent protective effects on the nervous system, ashwaganDHA may be a promising alternative treatment for a variety of degenerative diseases such as Alzheimer's and Parkinson's. AshwaganDHA has powerful antioxidant properties that seek and destroy the free radicals that have been implicated in aging and numerous disease states. Even more remarkable, emerging evidence suggests that ashwaganDHA has anti-cancer benefits as well.

Sharma A, Deo AD, Riteshkumar ST, Chanu TI, Das A. Effect of Withania somnifera (L. Dunal) root as a feed additive on immunological parameters and disease resistance to Aeromonas hydrophila in Labeo rohita (Hamilton) fingerlings. 1. Fish shellfish Immunol. 2010 Sep;29(3):508-12. Epub 2010 May 24.

The present study evaluated the efficacy of dietary doses of Withania somnifera (ashwaganDHA) root powder on immunological parameters and disease resistance against the bacterial pathogen Aeromonas hydrophila infections in Indian major carp, Labeo rohita fingerlings. Fishes were fed with dry diet containing 0 gkg(-1) (control), 1 gkg(-1) (T(1 border=0>, 2 gkg(-1) (T(2 border=0> and 3 gkg(-1) (T(3 border=0> W. somnifera root powder for 42 days. Immunological (NBT level, Phagocytic activity, total immunoglobulin and lysozyme activity) parameters of fishes were examined at 0 days, 14 days, 28 days and 42 days of feeding. Fishes were challenged with A. hydrophila 42 days post feeding and mortalities (%) were recorded over 14 days post-infection. The results demonstrate that fishes fed with W. somnifera root showed enhanced NBT level, Phagocytic activity, total Immunoglobulin level and lysozyme activity (p<0.05) compared with the control group. The survivability was higher in experimental diets than the control group. Dietary W. somnifera at the level of 2 gkg(-1) showed significantly (P<0.05) higher protection (RPS 42.85+/-0.65%) against A. hydrophila infection than control. The results suggest that the W. somnifera root powder have a stimulatory effect on immunological parameters and increases disease resistance in L. rohita fingerlings against A. hydrophila infection.