TY - JOUR
T1 - Effects of traditional Chinese medicines (TCM) on the immune response of grass carp (Ctenopharyngodon idellus)
AU - Choi, W. M.
AU - Mo, W. Y.
AU - Wu, S. C.
AU - MAK, Nai Ki
AU - BIAN, Zhaoxiang
AU - Nie, X. P.
AU - WONG, Ming Hung
N1 - Funding Information:
Acknowledgments Financial support from State Key Laboratory in Marine Pollution, Seed Collaborative Research Fund (HKBU CITYU SKLMP/SCRF/0003), and Environment and Conservation Fund (37/2009) of the Hong Kong SAR Government is gratefully acknowledged. We would also like to thank the staff in Au Tau Fisheries Centre of AFCD and Prof. XP Nie’s research group for technical support provided in the field experiment.
PY - 2014/4
Y1 - 2014/4
N2 - The use of traditional Chinese medicine (TCM) in aquaculture has been widely investigated. It is believed that herbal supplements could enhance the immunity and promote fish growth. The powdered TCM or its decoction can be easily applied in the form of feed supplements by direct incorporation into fish feeds and side effects are seldom found. In this study, Radix scutellaria (Rs) and Rhizoma coptidis (Rc) showed strong bacterial inhibition on Aeromonas hydrophila out of the sixteen selected herbal extracts. Four TCMs, R. scutellaria, R. coptidis, Herba andrographis (Ha), and Radix sophorae flavescentis (Rsf) were selected to form a compound formulation in the ratio of 1:1:2:3. A feeding experiment on grass carp was conducted with addition of the above TCM formulation (0.5, 1 and 2 % w/w) in the fish feed, and bactericidal activity, total protein and immunoglobulin in blood plasma, and nitroblue tetrazolium activity in the whole blood were measured. 2 % supplementation significantly improved (p < 0.05) the bactericidal activity and total immunoglobulin in the plasma after feeding for 21 days. Compared to control, 2 % TCM feeding groups showed a significantly lower mortality after A. hydrophila challenge at the end of experiment and the same result was archived in field trial. In the cost evaluation, the use of the TCM formulation in grass carp culture was insignificant and could be compensated by improved yield. TCM formulation contained different active ingredients including some immuno-stimulant and antimicrobial agents and therefore could be applicable to multiple diseases. Application of this TCM formulation would be a cost-effective and prophylactic approach for disease control in aquaculture, replacing the use of antibiotics for treating enteritis and even other general diseases.
AB - The use of traditional Chinese medicine (TCM) in aquaculture has been widely investigated. It is believed that herbal supplements could enhance the immunity and promote fish growth. The powdered TCM or its decoction can be easily applied in the form of feed supplements by direct incorporation into fish feeds and side effects are seldom found. In this study, Radix scutellaria (Rs) and Rhizoma coptidis (Rc) showed strong bacterial inhibition on Aeromonas hydrophila out of the sixteen selected herbal extracts. Four TCMs, R. scutellaria, R. coptidis, Herba andrographis (Ha), and Radix sophorae flavescentis (Rsf) were selected to form a compound formulation in the ratio of 1:1:2:3. A feeding experiment on grass carp was conducted with addition of the above TCM formulation (0.5, 1 and 2 % w/w) in the fish feed, and bactericidal activity, total protein and immunoglobulin in blood plasma, and nitroblue tetrazolium activity in the whole blood were measured. 2 % supplementation significantly improved (p < 0.05) the bactericidal activity and total immunoglobulin in the plasma after feeding for 21 days. Compared to control, 2 % TCM feeding groups showed a significantly lower mortality after A. hydrophila challenge at the end of experiment and the same result was archived in field trial. In the cost evaluation, the use of the TCM formulation in grass carp culture was insignificant and could be compensated by improved yield. TCM formulation contained different active ingredients including some immuno-stimulant and antimicrobial agents and therefore could be applicable to multiple diseases. Application of this TCM formulation would be a cost-effective and prophylactic approach for disease control in aquaculture, replacing the use of antibiotics for treating enteritis and even other general diseases.
KW - Aeromonas hydrophila
KW - Bactericidal activity
KW - Feed supplement
KW - Grass carp
KW - Traditional Chinese medicines
UR - http://www.scopus.com/inward/record.url?scp=84897671368&partnerID=8YFLogxK
U2 - 10.1007/s10499-013-9644-7
DO - 10.1007/s10499-013-9644-7
M3 - Journal article
AN - SCOPUS:84897671368
SN - 0967-6120
VL - 22
SP - 361
EP - 377
JO - Aquaculture International
JF - Aquaculture International
IS - 2
ER -
