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Acta Veterinaria Scandinavica logoLink to Acta Veterinaria Scandinavica
. 1991 Mar 1;32(1):9–14. doi: 10.1186/BF03546992

Clinical Use of Dichlorvos (Nuvan®) and Trichlorfon (Neguvon®) in the Treatment of Salmon Louse, Lepeophtheirus salmonis. Compliance with the Recommended Treatment Procedures

Klinisk bruk av dichlorvos (Nuvan®) og trichlorfon (Neguvon®) ved avlusning av fisk. Efterlevelse av anbefalte behandlingsmetoder

K Grave 1,, M Engelstad 1, N E Søli 1, E-L Toverud 1
PMCID: PMC8127880  PMID: 1950856

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 ½ 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.

Keywords: clinical evaluation, information sources, supervision, repeated treatment, recommended treatment equipment, oxygenation

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