Pseudodactylogyrosis in Anguilla anguilla (Actinopterygii: Anguilliformes: Anguillidae): change of control strategies due to occurrence of anthelmintic resistance
2011
Buchmann, K. | Kania, W. | Neumann, L. | De'Besi, G.,University of Copenhagen, Frederiksberg (Denmark). Dept. of Veterinary Disease Biology
The European eel, Anguilla anguilla (L.) infected by Pseudodactylogyrus anguillae were obtained from a typical recirculated eel-culture system which had been treated regularly but recently unsuccessfully with benzimidazole anthelmintics. In the laboratory infected eels were subjected to bath treatments with flubendazole (5 or 10 mg/l) or praziquantel (5 or 10 mg/l) for 24 h at 25ºC and parasite infections were recorded three days post-treatment. Gill monogeneans, Pseudodactylogyrus anguillae, were not controlled by the anthelmintic flubendazole at any of the dosages tested whereas praziquantel showed a significant effect when used as bath (5 and 10 mg/l). The failure of flubendazole for control of pseudodactylogyrosis may result from selection of anthelmintic resistant parasite strains due to use of benzimidazoles for decades. Future treatment regimes during acute outbreaks may be based on praziquantel
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