Praziquantel (Droncit) is effective against diplostomosis of grasscarp Ctenopharyngodon idella and silver carp Hypophthalmichthys molitrix

Székely, Csaba and Molnár, Kálmán (1991) Praziquantel (Droncit) is effective against diplostomosis of grasscarp Ctenopharyngodon idella and silver carp Hypophthalmichthys molitrix. Diseases of Aquatic Organisms, 11 (2). pp. 147-150. ISSN 0177-5103 (print), 1616-1580 (online)

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Abstract

In laboratory experiments praziquantel (Droncit) effectively destroyed metacercariae of Diplostomum spathaceum (s. l.) parasitizing the eye lens of grasscarp Ctenopharyngodon idella and silver carp Hypophthalmichthys molitrix. A single treatment with Droncit fed at a dose of 330 mg kg^-1 body mass showed 100% efficacy against metacercariae parasitizing grasscarp. A similar, complete parasiticidal efficacy was achieved when infected grasscarp and silver carp specimens were exposed to a solution containing 1 mg praziquantel l^-1 for at least 90 h. Using shorter exposures (20 min to 1 h) but elevated praziquantel doses (10 to 100 mg l^-1), some parasites survived but even here the intensity effect reached 67 to 97%.

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