Efficacy of some anthelmintics against the swimbladder nematode Anguillicola crassus of eel Anguilla anguilla under saltwater conditions
Geets, A.; Liewes, E.W.; Ollevier, F.P. (1992). Efficacy of some anthelmintics against the swimbladder nematode Anguillicola crassus of eel Anguilla anguilla under saltwater conditions. Dis. Aquat. Org. 13(2): 123-128. https://dx.doi.org/10.3354/dao013123
In: Diseases of Aquatic Organisms. Inter Research: Oldendorf/Luhe. ISSN 0177-5103; e-ISSN 1616-1580, meer
Six anthelmintic drugs, Ivermectin, Closantel, Safewormer, Masoten, Oxfendazole and L-Levamisol·HCL were screened for their efficacy against Anguillicola crassus, a swimbladder nematode of European eel Anguilla anguilla. All experiments were carried out under saltwater conditions. Of the 6 drugs, L-Levamisole·HCL used in a bath treatment gave the most promising results. Evaluation of the curative dose of L-Levamisole·HCL showed that a long-term treatment (24h). Dosages lower than 20 mg 1-1 showed a lower efficacy against Anguillicola crassus. However, even with a long-term, high-dosage treatment, some recovery of adult nematodes with sublethal damage and/or migration of viable juveniles into the swimbladder lumen could not be excluded. When examined 35d after treatment, the percentage of mobile adults had increased, while a decrease in percentage of dead worms was noticed compared to values obtained immediately after treatment.
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