Teflubenzuron as a tool for control of trichodinids in freshwater fish: Acute toxicity and in vivo efficacy

Ikefuti, Cynthia Venâncio; Carraschi, Silvia Patrícia; Barbuio, Roberto; Cruz, Claudinei da; Pádua, Santiago Benites de; Onaka, Eduardo Makoto; Ranzani-Paiva, María José Tavares

doi:10.1016/j.exppara.2015.04.007

Cited by 9 publications

(6 citation statements)

References 18 publications

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“…The methods for quantifying trichodinids are based on direct or indirect counting. In direct evaluations, the total number of parasites is counted, either from mucus smears from the body surface of each host, prepared on glass slides (Jerônimo et al 2012;Zago et al 2014;Ikefuti et al 2015;Ö zer et al 2015) or the number on one side of the host's body (Madsen et al 2000). To analyze the gills, the arches are collected and placed between a slide and cover slip (Jerônimo et al 2012;Ikefuti et al 2015).…”

Section: Methodologies For Identification and Quantitative And Qualitmentioning

confidence: 99%

“…In direct evaluations, the total number of parasites is counted, either from mucus smears from the body surface of each host, prepared on glass slides (Jerônimo et al 2012;Zago et al 2014;Ikefuti et al 2015;Ö zer et al 2015) or the number on one side of the host's body (Madsen et al 2000). To analyze the gills, the arches are collected and placed between a slide and cover slip (Jerônimo et al 2012;Ikefuti et al 2015). The fresh material can be analyzed under an ordinary optical microscope after drying at room temperature (Valladão et al 2013;Valladão et al 2016a) or after fixing in 70% alcohol (Zago et al 2014).…”

Section: Methodologies For Identification and Quantitative And Qualitmentioning

confidence: 99%

“…For this reason, its toxicity towards aquatic invertebrates is high (Harms 1996). Therefore, because of its low toxicity towards vertebrates and because it acts on chitin, which is also present in the structure of the adhesive disk of trichodinids, it was tested against this ciliate (Ikefuti et al 2015) (Table 3). In another study, hydrogen peroxide did not show any positive results against trichodinids (Rach et al 2000).…”

Section: Methods For Prevention and Control Of Trichodinidsmentioning

confidence: 99%

“…Fish such as the tilapia O. niloticus, C. macropomum and P. mesopotamicus are more resistant than species of Siluriformes. For this reason, a Ikefuti et al (2015) Oreochromis niloticus 50 mg/L-bath for 1 h for 5 days between 24-h intervals Ikefuti et al (2015) Compound based on peroxide…”

Section: Methods For Prevention and Control Of Trichodinidsmentioning

confidence: 99%

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Trichodinidae in commercial fish in South America

Maciel

Garcia

Chagas

et al. 2017

Rev Fish Biol Fisheries

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Ciliates of the family Trichodinidae are protozoan parasites of importance for fish farming in South America, given that at high infestation levels, they cause significant mortality among farmed fish. Although data on economic losses due to parasitosis are not available for South America, mortality outbreaks correlated to trichodinids are very common in the tilapia production chain, especially in Brazil, the largest aquaculture chain in the country. In Brazil in the past, trichodinids were considered only as Trichodina sp. Today, they have been better studied and identified taxonomically in wild and farmed fish. However, in other countries in South America, trichodinids continue to be described only as Trichodina sp. This review presents the history of occurrences of trichodinids in fish of interest in South America, highlighting 15 new species that have been described in three genera in Brazil, along with information on parasite-host-environment relationships, diagnostic methods and treatments. The occurrence of parasitic ciliates must be correlated with farming conditions such as stress factors, water quality, seasonality, age and host immunity to elucidate the critical points of each production system. Furthermore, for tropical fish, studies on treatment against trichodinid species are needed to provide support for approval of antiparasitic medications for use in fish farming. However, it is recommended that the production sector use intensive production systems that are more sustainable, with biosafety protocols, to increase production and productivity.

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Section: Methodologies For Identification and Quantitative And Qualitmentioning

confidence: 99%

Section: Methodologies For Identification and Quantitative And Qualitmentioning

confidence: 99%

Section: Methods For Prevention and Control Of Trichodinidsmentioning

confidence: 99%

Section: Methods For Prevention and Control Of Trichodinidsmentioning

confidence: 99%

See 2 more Smart Citations

Trichodinidae in commercial fish in South America

Maciel

Garcia

Chagas

et al. 2017

Rev Fish Biol Fisheries

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“…The electrical conductivity increase in the ecotoxicity tests occurs due to the chemicals dissociation, leading to a higher disponibility of the dissoved ions and may interfere in oxygen assimilation, homeostasis and osmotic regulation in fish. [49]…”

Section: Control Efficacy For the Unicellular Algae Ankistrodesmus Grmentioning

confidence: 99%

Diquat associated with copper sources for algae control: Efficacy and ecotoxicology

Garlich

Cruz

Silva

et al. 2016

Journal of Environmental Science and Health, Part B

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The aims of this research were to evaluate the efficacy of copper oxychloride (CuCl2.3Cu(OH)2), copper hydroxide (Cu(OH)2) and diquat (1.1'-ethylene-2.2'-bipyridyldiylium dibromide), isolated and in association with 0.1% of both copper sources, in the control of the unicellular algae Ankistrodesmus gracilis and the filamentous algae Pithophora kewesis, and to determine the acute toxicity of the tested chemicals in Hyphressobrycon eques, Pomacea canaliculata, Lemna minor and Azolla caroliniana. The efficacy was estimated by the methods of chlorophyll a and pheophytin a readings, changed into growth inhibition percentage. Both algae were exposed to the following concentrations: 0.2; 0.4; 0.8; 1.2 mg L(-1) of diquat and its association with the copper sources; and 0.1; 0.3; 0.5; 0.7; 1.0 and 1.5 mg L(-1) in the isolated applications of copper hydroxide and copper oxychloride. An untreated control was kept. The acute toxicity was estimatedby 50% lethal concentration (LC50). The copper sources were effective for A. gracilis control, at rates as high as 0.1 mg L(-1) (>95% efficacy). Isolated diquat and its association with copper hydroxide were both effective at rates as high as 0.4 mg L(-1), with 95 and 88% control efficacy, respectively. The copper oxychloride was effective at 0.2 mg L(-1), with 93% efficacy. None of the tested chemicals and associations was effective on P. kewesis control. The most sensitive non target organism to the tested chemicals was L. minor; the less sensitive was H. eques.

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Protozoal Diseases

Hadfield¹

2021

Clinical Guide to Fish Medicine

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Teflubenzuron as a tool for control of trichodinids in freshwater fish: Acute toxicity and in vivo efficacy

Cited by 9 publications

References 18 publications

Trichodinidae in commercial fish in South America

Trichodinidae in commercial fish in South America

Diquat associated with copper sources for algae control: Efficacy and ecotoxicology

Protozoal Diseases

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