Efficacy of green tea extract on removal of the ectoparasitic flagellate Ichthyobodo necator from chum salmon, Oncorhynchus keta, and masu salmon, O. masou

Suzuki, Kazutoshi; Misaka, Naoyuki; Sakai, Daiku K.

doi:10.1016/j.aquaculture.2006.05.004

Cited by 20 publications

(11 citation statements)

References 10 publications

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“…Serum bactericidal activity against Y. ruckeri was significantly increased (P < 0.05) in the group supplemented with 20 mg kg À1 of decaffeinated green tea (T 1 ). Antibacterial and parasitical properties of green tea in fish species were shown previously by Suzuki et al (2006) and AbdelTawwab et al (2010) [4,14]. In the present study, serum peroxidase content was increased in all treatment groups in comparison with control group.…”

Section: Introductionsupporting

confidence: 82%

Immunomodulatory effects of decaffeinated green tea (Camellia sinensis) on the immune system of rainbow trout (Oncorhynchus mykiss)

Sheikhzadeh

Nofouzi

Delazar

et al. 2011

Fish & Shellfish Immunology

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Section: Introductionsupporting

confidence: 82%

Immunomodulatory effects of decaffeinated green tea (Camellia sinensis) on the immune system of rainbow trout (Oncorhynchus mykiss)

Sheikhzadeh

Nofouzi

Delazar

et al. 2011

Fish & Shellfish Immunology

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“…Many medical plants have been studied to control fish parasites, such as Pinus elliottii (Tóro et al 2003), Mucuna pruriens, Carica papaya (Ekanem et al 2004a), Piper guineense (Ekanem et al 2004b), the green tea (Suzuki et al 2006), and Terminalia catappa L. (Chansue 2007). However, there is little information about the use of medical plant for D. intermedius, including Fructus cnidii (Wang, et al 2008), Fructus arctii (Wang et al 2009), Macleaya microcarpa , Radix angelicae pubescentis, Fructus bruceae, Caulis spatholobi, Semen aesculi, and Semen pharbitidis (Liu et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Anthelmintic activity of the crude extracts, fractions, and osthole from Radix angelicae pubescentis against Dactylogyrus intermedius in goldfish (Carassius auratus) in vivo

Wang

et al. 2010

Parasitol Res

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A bioassay-guided fractionation was performed to evaluate the anthelmintic activity of the crude extract fractions and osthole from Radix angelicae pubescentis against Dactylogyrus intermedius in goldfish (Carassius auratus) in vivo. Among four extracts (petroleum ether, ethyl acetate, acetone, and ethanol), only ethanol extract exhibited the best anthelmintic efficacy with 100% mortality of Dactylogyrus and no death of fish at the optimal anthelminthic concentration of 120 mg/L. Therefore, ethanol extract was subjected to column chromatography to obtain sixteen fractions. The activity was found in fraction F with 100% mortality of Dactylogyrus and no toxicity to fish at dose of 2.0 mg/L. A white crystal was isolated from fraction F and identified as osthole which exhibited the optimal activity with 100% mortality of Dactylogyrus at 1.6 mg/L had and no toxicity to fish at dose up to 6.2 mg/L. This is the first report on the isolation and identification of anthelmintic active compound from R. angelicae pubescentis against D. intermedius in goldfish (C. auratus) in vivo.

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“…Ekanem et al (2004) accessed the effects of crude extracts from Mucuna pruriens and Carica papaya against I. multifiliis. Green tea extract has been reported to kill Ichthyobodo necator (Suzuki et al 2006). Capsicum frutescens, as Mayan and Chinese medicine, is readily available and affordable.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2012

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Abstracts 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.

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Efficacy of green tea extract on removal of the ectoparasitic flagellate Ichthyobodo necator from chum salmon, Oncorhynchus keta, and masu salmon, O. masou

Cited by 20 publications

References 10 publications

Immunomodulatory effects of decaffeinated green tea (Camellia sinensis) on the immune system of rainbow trout (Oncorhynchus mykiss)

Immunomodulatory effects of decaffeinated green tea (Camellia sinensis) on the immune system of rainbow trout (Oncorhynchus mykiss)

Anthelmintic activity of the crude extracts, fractions, and osthole from Radix angelicae pubescentis against Dactylogyrus intermedius in goldfish (Carassius auratus) in vivo

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

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