Effects of aqueous extract of Capsicum frutescens (Solanaceae) against the fish ectoparasite Ichthyophthirius multifiliis

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	Effects of aqueous extract of Capsicum frutescens (Solanaceae) against the fish ectoparasite Ichthyophthirius multifiliis
	Ling, Fei 1,2; Wang, Jian-Guo 2; Lu, Cheng 1; Wang, Gao-Xue 1; Lui, Yong-Hui 3; Gong, Xiao-Ning 2
刊名	PARASITOLOGY RESEARCH
	2012-08-01
卷号	111 期号:2 页码:841-848
关键词	GOLDFISH CARASSIUS-AURATUS TROUT ONCORHYNCHUS-MYKISS CYPRINUS-CARPIO L MALACHITE GREEN CHANNEL CATFISH PARASITIC INFECTIONS RAINBOW-TROUT POTASSIUM-PERMANGANATE SODIUM PERCARBONATE COPPER-SULFATE
ISSN号	0932-0113
通讯作者	Ling, F (reprint author), NW A&F Univ, Coll Anim Sci & Technol, Yangling 712100, Peoples R China.
中文摘要	Ichthyophthirius multifiliis is an important fish ectoparasite that often results in significant economic losses to freshwater aquaculture. The search of alternative substances to control infections of I. multifiliis became stringent after malachite green, an effective and widely used chemotherapeutant, is banned on fish farms because of its carcinogenicity and teratogenicity. In this study, the effects of the aqueous extract of Capsicum frutescens, which is readily available and affordable, were evaluated under in vitro and in vivo conditions. The results in the in vitro conditions showed that the aqueous extracts of C. frutescens with the ratios (V (SS)/V (T)-V (SS), the volume of stock solution; V (T), the volume of total solution) of 1:32 and 1:64 led to more than 70 % mortality of I. multifiliis theronts during 4 h of exposure and significantly reduced the survival of the tomonts and the total number of theronts released by the tomonts within 22 h (P < 0.05). A 96-h bioassay was carried out to determine the acute toxicity of the aqueous extract of C. frutescens to goldfish. No visible effect was observed in the treatments with the aqueous extracts of C. frutescens with the ratios (V (SS)/V (T)) of 1:32, 1:64 and 1:128, while in the other treatments, the erratic behaviour of fish was noted. In addition, in vitro tests demonstrated that the aqueous extract of C. frutescens had an adverse effect on I. multifiliis trophonts in situ. Fish treated with the aqueous extracts of C. frutescens in ratios V (SS)/V (T) of 1:32 and 1:64 carried significantly fewer parasites than the control and the other treatments (P < 0.05). These results suggest, therefore, that aqueous extracts of C. frutescens have potential for the control of ichthyophthiriasis in the aquaculture industry, though further phytochemical studies will need to be performed for isolation and identification of the active compounds.
英文摘要	Ichthyophthirius multifiliis is an important fish ectoparasite that often results in significant economic losses to freshwater aquaculture. The search of alternative substances to control infections of I. multifiliis became stringent after malachite green, an effective and widely used chemotherapeutant, is banned on fish farms because of its carcinogenicity and teratogenicity. In this study, the effects of the aqueous extract of Capsicum frutescens, which is readily available and affordable, were evaluated under in vitro and in vivo conditions. The results in the in vitro conditions showed that the aqueous extracts of C. frutescens with the ratios (V (SS)/V (T)-V (SS), the volume of stock solution; V (T), the volume of total solution) of 1:32 and 1:64 led to more than 70 % mortality of I. multifiliis theronts during 4 h of exposure and significantly reduced the survival of the tomonts and the total number of theronts released by the tomonts within 22 h (P < 0.05). A 96-h bioassay was carried out to determine the acute toxicity of the aqueous extract of C. frutescens to goldfish. No visible effect was observed in the treatments with the aqueous extracts of C. frutescens with the ratios (V (SS)/V (T)) of 1:32, 1:64 and 1:128, while in the other treatments, the erratic behaviour of fish was noted. In addition, in vitro tests demonstrated that the aqueous extract of C. frutescens had an adverse effect on I. multifiliis trophonts in situ. Fish treated with the aqueous extracts of C. frutescens in ratios V (SS)/V (T) of 1:32 and 1:64 carried significantly fewer parasites than the control and the other treatments (P < 0.05). These results suggest, therefore, that aqueous extracts of C. frutescens have potential for the control of ichthyophthiriasis in the aquaculture industry, though further phytochemical studies will need to be performed for isolation and identification of the active compounds.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Parasitology
研究领域[WOS]	Parasitology
关键词[WOS]	GOLDFISH CARASSIUS-AURATUS ; TROUT ONCORHYNCHUS-MYKISS ; CYPRINUS-CARPIO L ; MALACHITE GREEN ; CHANNEL CATFISH ; PARASITIC INFECTIONS ; RAINBOW-TROUT ; POTASSIUM-PERMANGANATE ; SODIUM PERCARBONATE ; COPPER-SULFATE
收录类别	SCI
资助信息	National Basic Research Program (973 Program)[2009CB118700]; Huai'an Technological Program[SN1087]; Doctor Initial Research Foundation of Northwest AF University[2010BSJJ005]
语种	英语
WOS记录号	WOS:000306694400040
公开日期	2012-09-25
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/16909]
专题	水生生物研究所_鱼类生物学及渔业生物技术研究中心_期刊论文
作者单位	1.NW A&F Univ, Coll Anim Sci & Technol, Yangling 712100, Peoples R China 2.Chinese Acad Sci, Inst Hydrobiol, Lab Hlth Aquaculture, Wuhan 430072, Peoples R China 3.Natl Fishery Tech Extens Ctr, Beijing 100026, Peoples R China
推荐引用方式 GB/T 7714	Ling, Fei,Wang, Jian-Guo,Lu, Cheng,et al. Effects of aqueous extract of Capsicum frutescens (Solanaceae) against the fish ectoparasite Ichthyophthirius multifiliis[J]. PARASITOLOGY RESEARCH,2012,111(2):841-848.
APA	Ling, Fei,Wang, Jian-Guo,Lu, Cheng,Wang, Gao-Xue,Lui, Yong-Hui,&Gong, Xiao-Ning.(2012).Effects of aqueous extract of Capsicum frutescens (Solanaceae) against the fish ectoparasite Ichthyophthirius multifiliis.PARASITOLOGY RESEARCH,111(2),841-848.
MLA	Ling, Fei,et al."Effects of aqueous extract of Capsicum frutescens (Solanaceae) against the fish ectoparasite Ichthyophthirius multifiliis".PARASITOLOGY RESEARCH 111.2(2012):841-848.