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Ikefuti CV, Carraschi SP, Barbuio R, da Cruz C, de Pádua SB, Onaka EM, Ranzani-Paiva MJT. Teflubenzuron as a tool for control of trichodinids in freshwater fish: Acute toxicity and in vivo efficacy. Exp Parasitol 2015; 154:108-12. [PMID: 25913667 DOI: 10.1016/j.exppara.2015.04.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 04/07/2015] [Accepted: 04/19/2015] [Indexed: 10/23/2022]
Abstract
In this study we describe the anti-Trichodina effects of teflubenzuron (TFB) for Oreochromis niloticus and for Piaractus mesopotamicus. We also evaluated the acute toxicity, for both species, by using TFB in the concentrations of 700.0, 800.0, 900.0 and 1000.0 mg L(-1) and a control, without the drug. To assess the efficacy of TFB against Trichodina spp., we used the concentrations of 30.0 or 50.0 mg L(-1) for one hour exposure in tilapia, and the concentration of 30.0, 50.0 and 80.0 mg L(-1) for one hour and 50 mg L(-1) for two hours exposures in pacu. Teflubenzuron did not present significant toxicity in either species, with LC50;48h > 1000.0 mg L(-1). The drug effectiveness was observed against four identified Trichodina species: T. magna, T. heterodentata, T. compacta and T. centrostrigeata, with 87.9% parasite reduction with one hour exposure to 50.0 mg L(-1) TFB on O. niloticus and 96.1% with two hours exposure to 50.0 mg L(-1) TFB on P. mesopotamicus. Teflubenzuron is a drug with potential to be used in Brazilian aquaculture; it attends to important requirements, such as low toxicity and high efficacy in controlling Trichodina spp. infection in O. niloticus and P. mesopotamicus.
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Affiliation(s)
- Cynthia Venâncio Ikefuti
- Aquaculture Center, São Paulo State University (CAUNESP), Jaboticabal, SP, Brazil; Weed Science Environmental Research Studies, College of Agricultural and Veterinary Science at Unesp, Plant Health Department, São Paulo State University, Prof. Dr. Paulo Donato Castellani Access route, no number, rural area, CEP: 14884-900, Jaboticabal, SP, Brazil.
| | - Silvia Patrícia Carraschi
- Weed Science Environmental Research Studies, College of Agricultural and Veterinary Science at Unesp, Plant Health Department, São Paulo State University, Prof. Dr. Paulo Donato Castellani Access route, no number, rural area, CEP: 14884-900, Jaboticabal, SP, Brazil
| | - Roberto Barbuio
- Weed Science Environmental Research Studies, College of Agricultural and Veterinary Science at Unesp, Plant Health Department, Graduate Program in Veterinary Pathology, São Paulo State University, Prof. Dr. Paulo Donato Castellani Access route, no number, rural area, CEP: 14884-900, Jaboticabal, SP, Brazil
| | - Claudinei da Cruz
- University Center of Educational Foundation of Barretos (Unifeb), Professor Roberto Frade Monte Avenue, n° 389, CEP: 14783-226, Barretos, SP, Brazil
| | - Santiago Benites de Pádua
- AquiVet Aquatic Health, Cristóvão Colombo Street, 1519, Jardim Nazareth, CEP: 15054000, São José do Rio Preto, SP, Brazil
| | - Eduardo Makoto Onaka
- Fisheries Institute, Washington Luis Highway Km 445, Caixa Postal 1052, CEP: 15025-970, São José do Rio Preto, SP, Brazil
| | - Maria José Tavares Ranzani-Paiva
- Laboratory of Aquatic Organisms Pathology (CPDPO) Fisheries Institute, Francisco Matarazzo Avenue, n°455, Barra Funda, CEP: 05001-900, São Paulo, SP, Brazil
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Tavares-Dias M, Marchiori NDC, Martins ML. Paratrichodina africana (Ciliophora: Trichodinidae) of wild and cultured Nile tilapia in the Northern Brazil. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2013; 22:248-52. [DOI: 10.1590/s1984-29612013005000025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2012] [Accepted: 02/01/2013] [Indexed: 11/22/2022]
Abstract
The present work morphologically characterizes Paratrichodina africana from the gills of wild and farmed Nile tilapia from Northern Brazil (eastern Amazonia). Ninety fish were captured for parasitological analysis in Macapá, State of Amapá, from a wetland area bathed by the Amazon River commonly called ‘Ressaca do Zerão’ (n = 52), as well as from a local fish farm (n = 38). Wet smears of the skin and gills of the captured fish were air dried at room temperature and impregnated with silver nitrate by Klein's method for posterior examination of the adhesive disc structures. Total prevalence of parasitism was 16.6% (23% in fish from wetland and 7.8% in farmed fish). Characterized as a small-sized trichodinid, it presented the following measures: 33.2 ± 4.7 µm body diameter, 17.5 ± 2.1 µm adhesive disc, 10.0 ± 0.9 µm denticulate ring, and 22.6 ± 2.0 denticles. Paratrichodina africana reported in this study strongly resembles those described for other localities, but it differs by presenting greater body length. This is the fourth report of P. africana parasitizing a host fish.
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