Efficacy of bath and orally administered praziquantel and fenbendazole against Lepidotrema bidyana (Murray), a monogenean parasite of silver perch, Bidyanus bidyanus (Mitchell)

James Forwood, James Harris, Marty Deveney

    Research output: Contribution to journalArticle

    21 Citations (Scopus)

    Abstract

    We investigated the efficacy of praziquantel (PZQ) and fenbendazole (FBZ), each administered by bath and orally, against the monogenean Lepidotrema bidyana Murray, a gill parasite of the freshwater fish silver perch, Bidyanus bidyanus (Mitchell). 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.

    Original languageEnglish
    Pages (from-to)939-947
    Number of pages9
    JournalJournal of Fish Diseases
    Volume36
    Issue number11
    DOIs
    Publication statusPublished - 2013

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