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Diseases of Aquatic Organisms

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DAO 33:51-56 (1998)  -  doi:10.3354/dao033051

Oral pharmacological treatments for parasitic diseases of rainbow trout Oncorhynchus mykiss. I: Hexamita salmonis

J. L. Tojo*, M. T. Santamarina

Department of Microbiology and Parasitology, Laboratory of Parasitología, Faculty of Pharmacy, Universidad de Santiago de Compostela, E-15706 Santiago de Compostela, Spain

Various drugs were evaluated as regards efficacy for the treatment of Hexamita salmonis infection in rainbow trout. The results confirm the efficacy of nitroimidazoles: infection was completely eradicated not only by metronidazole (which has been recommended previously for the treatment of hexamitosis), but also by benznidazole, ronidazole and secnidazole, which have not been assayed previously. The non-nitroimidazoles albendazole, aminosidine, diethylcarbamazine and nitroscanate also completely eliminated infection. The remaining non-nitroimidazoles tested (amprolium, bithionol, febantel, flubendazole, levamisole, netobimin, niclosamide, nitroxynil, oxibendazole, parbendazole, piperazine, praziquentel, tetramisole, thiophanate, toltrazuril, trichlorfon and triclabendazole) were not effective.

Hexamitosis · Rainbow trout · Treatment · Drugs

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