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In-feed Praziquantel treatment of grass carp (Ctenopharyngodon idella) infected with eye flukes

Author

Listed:
  • E Zuskova

    (South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Faculty of Fisheries and Protection of Waters, University of South Bohemia in České Budějovice, Vodňany, Czech Republic)

  • J Velisek

    (South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Faculty of Fisheries and Protection of Waters, University of South Bohemia in České Budějovice, Vodňany, Czech Republic)

Abstract

Praziquantel (PZQ) is a drug effective against several parasitic diseases of fish caused by Platyhelminthes. The study assesses the efficacy of selected in-feed PZQ doses in eliminating metacercariae Diplostomum pseudospathaceum in grass carp. The fish were infected with D. pseudospathaceum in laboratory conditions and subsequently treated with PZQ at daily doses of 30 (PZQ1), 50 (PZQ2), and 100 (PZQ3) mg/kg bw for seven days. The treatment trial was followed by a 23-day observation period during which the fish were parasitologically examined on days 0, 2, 8 and 23. Smaller fish were infected with a significantly higher (P < 0.05) number of metacercariae than bigger fish among three weight groups as follows: up to 7 g > 7 to 12 g > 12 g. The in-feed PZQ at doses of 30, 50 and 100 mg/kg bw for seven days was 47%, 84% and 88% effective against metacercariae D. pseudospathaceum, respectively. A significant decrease (P < 0.01) in moving and an increase (P < 0.01) in the immotile metacercariae in the eye's lens were recorded in all the trial groups on each sampling day. An increasing proportion of motile metacercariae in the post-treatment observation period was seen in PZQ2 and PZQ3, indicating a decreasing trend in the actual efficacy in an environment with no reinfection possibility.

Suggested Citation

  • E Zuskova & J Velisek, 2024. "In-feed Praziquantel treatment of grass carp (Ctenopharyngodon idella) infected with eye flukes," Veterinární medicína, Czech Academy of Agricultural Sciences, vol. 69(1), pages 1-7.
    • Handle: RePEc:caa:jnlvet:v:69:y:2024:i:1:id:97-2023-vetmed
    DOI: 10.17221/97/2023-VETMED
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    References listed on IDEAS

    as
    1. J Kolarova & E Zuskova & J Velisek, 2022. "Efficacy of a therapeutic bath with selected antiparasitic drugs on a Dactylogyrus anchoratus infection in juvenile common carp (Cyprinus carpio)," Veterinární medicína, Czech Academy of Agricultural Sciences, vol. 67(12), pages 620-627.
    2. E Zuskova & V Piackova & O Valentova & K Zalohova & J Velisek, 2022. "Acute toxicity of praziquantel to fish Danio rerio and planktonic crustacean Daphnia magna," Veterinární medicína, Czech Academy of Agricultural Sciences, vol. 67(11), pages 579-584.
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    1. R Dobsikova & J Blahova & P Marsalek & V Doubkova & E Zuskova & J Velisek, 2024. "Pharmacokinetics of praziquantel and its metabolites in grass carp (Ctenopharyngodon idella) following the oral administration of a single bolus," Veterinární medicína, Czech Academy of Agricultural Sciences, vol. 69(2), pages 52-60.

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