The effect of mistletoe, Viscum album coloratum, extract on innate immune response of Nile tilapia (Oreochromis niloticus)

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• 作者：Kwan-Ha Park ; Sang-Hoon Choi ; ^{shchoi@kunsan.ac.kr}
• 关键词：Mistletoe ; Respiratory burst activity ; Lysozyme ; Alternative complement activity ; Nile tilapia
• 刊名：Fish & Shellfish Immunology
• 出版年：2012
• 期刊代码：115_10504648
• 类别：abs
• 出版时间：June, 2012
• 卷：32
• 期：6
• 页码：1016-1021
• 文件大小：498 K

摘要

The purpose of the present study was to evaluate the effect of dietary mistletoe extracts on non-specific immune response and disease resistance of Nile tilapia (Oreochromis niloticus) against Aeromonas hydrophila infection. Tilapia fingerlings were fed with a diet containing 0聽mg as a control, 10聽mg, 50聽mg, and 200聽mg mistletoe powder kg^鈭? dry diet for 80 days. The immunological parameters, respiratory burst activity, lysozyme activity, alternative complement haemolysis activity (ACH₅₀), and phagocytic activity of fish were investigated following 20, 40 and 80 days of feeding. Fish were challenged with A.聽hydrophila on 80 days after feeding and mortalities were checked over 10 days post-infection. The results show that fish fed with mistletoe extract exhibited an increase in activity in all immunological parameters (P聽<聽0.05) compared to the control group depending on feeding periods and doses of mistletoe. Following challenge with A.聽hydrophila, 42%less survivability was observed in the control group than in other experimental diet groups. The highest survival rate (83%) was shown in the group fed with a 50聽mg mistletoe kg^鈭? diet. The results suggest that mistletoe enables tilapia to promote immunity and be more resistant to A.聽hydrophila infection.