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Efficacy of bath and orally administered praziquantel and fenbendazole against L epidotrema bidyana M urray, a monogenean parasite of silver perch, B idyanus bidyanus ( M itchell)
Author(s) -
Forwood J M,
Harris J O,
Deveney M R
Publication year - 2013
Publication title -
journal of fish diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 85
eISSN - 1365-2761
pISSN - 0140-7775
DOI - 10.1111/jfd.12089
Subject(s) - praziquantel , fenbendazole , biology , juvenile , aquaculture , fishery , perch , parasite hosting , zoology , aquatic animal , veterinary medicine , anthelmintic , fish <actinopterygii> , helminths , schistosomiasis , medicine , ecology , world wide web , computer science
We investigated the efficacy of praziquantel ( PZQ ) and fenbendazole ( FBZ ), each administered by bath and orally, against the monogenean L epidotrema bidyana M urray, a gill parasite of the freshwater fish silver perch, B idyanus bidyanus ( M itchell). PZQ and FBZ were each administered by bath at 10 mg L −1 for 48 h and on surface‐coated feed pellets at 75 mg kg −1 per body weight ( BW ) per day for 6 days. Bath treatments of PZQ and FBZ had an efficacy of 99% and 91%, respectively, against adult L . bidyana . Oral treatments of PZQ and FBZ had an efficacy of 79% and 95%, respectively, against adult L . bidyana . Fish rejected feed pellets surface‐coated with PZQ , suggesting that palatability of surface‐coated PZQ ‐medicated feed is poor, which undermined efficacy. In all trials, some juvenile parasites were present on fish after treatment during efficacy assessment, indicating that efficacy may be lower against juvenile parasites or that recruitment occurred post‐treatment, demonstrating that repeat treatments are necessary to effectively control L . bidyana in aquaculture.