Ảnh hưởng của cao chiết thầu dầu (Ricinus communis L.) lên miễn dịch và khả năng kháng bệnh do Vibrio parahaemolyticus của tôm thẻ chân trắng (Penaeus vannamei)

Abstract

This study aim to determine effects of R. communis L. extract on the immune response and resistance to V. parahaemolyticus of the white leg shrimp (P. vannamei). The shrimp was reared with commercial feed mixed with 0; 0.5%; 1% and 2% R. communis extract for 60 days. The total haemocyte count (THC), the differential haemocyte count (DHC), phenoloxidase (PO) activity and superoxide dismutase (SOD) activity of the supplemented experiment at 30-day and 60-day treatment. The resistance to V. parahaemolyticus of P. vannamei were examine somebody in the 60 day treatment. The results showed that (i) THC, DHC and PO activity in the supplemented treatments were higher than in the control treatment in the 30th day and 60th day; however, the supplemented treatment of 1.0% was the highest (P