Seasonality of <i>Clinostomum complanatum</i> Cercariae in the Snail Host <i>Radix auricularia japonica</i> and Drug Treatment of the Parasite in Goldfish <i>Carassius auratus</i>

Abstract

and can cause mass mortality in farmed fishes (Lo et al., 1981). Mass mortality of goldfish Carassius auratus caused by Clinostomum while high temperature water treatment has been reported (Yasumoto et al., 2018). Infection of C. complanatum also reduces or eliminates the commercial value of ornamental fishes because metacercariae are externally visible as

Praziquantel use in aquaculture – Current status and emerging issues

“…spp. in catfish and bass at concentrations starting from 0.25 mg/L ( Lorio, 1989 ; Plumb and Rogers, 1990 ; Mitchell, 1995 ), while oral administration and injection have been shown to significantly reduce infections in goldfish and catfish, respectively ( Lorio, 1989 ; Arakawa et al, 2021 ). PZQ is also very efficacious against Diplostomum spathaceum , with bath treatments shown to completely clear metacercaria from fish or larval forms from freshwater snails ( Moser et al, 1986 ; Plumb and Rogers, 1990 ; Székely and Molnár, 1991 ; Voutilainen et al, 2009 ; Zuskova et al, 2018 ).…”

“…The potential for mortalities in fish linked to PZQ's action on internal parasites exists. Mass mortalities in goldfish have been linked to treatment with PZQ and trichlorfon, with drug treatment proposed to activate mass C. complanatum metacercaria excystment resulting in lethal damage to fish; treatment before metacercariae fully develop has been proposed to avoid this outcome ( Arakawa et al 2021 ).…”