Clinical use of dichlorvos (Nuvan) and trichlorfon (Neguvon) in the treatment of salmon louse, Lepeophtheirus salmonis. Compliance with the recommended treatment procedures |
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Authors: | K Grave M Engelstad N E Sli E-L Toverud |
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Institution: | Department of Pharmacology and Toxicology, Norwegian College of Veterinary Medicine/National Veterinary Institute, Oslo. |
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Abstract: | Veterinarians representing one third of the Norwegian fish farms were asked about the clinical use of dichlorvos and trichlorfon by use of a questionnaire. A total of 45 veterinarians had experience in treatment of salmon lice with these organophosphates. Fourty-nine percent of the veterinarians reported that the fish farmers in their region solely used the recommended treatment equipment when delousing the fish, of these 1/4 always oxygenated the treatment solution. Repeated treatment were always prescribed by 24% of the veterinarians, while 44% did this occasionally. Of the 45 veterinarians 7% were often present and 44% were occasionally present at the fish farms in connection with the treatment. The answers showed that compliance with the recommended treatment procedures was unsatisfactory. |
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Keywords: | clinical evaluation information sources supervision repeated treatment recommended treatment equipment oxygenation |
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