Test if it is possible to cure lice for two rhabdovirus simultaneously. Used lice taken from Hardanger fjord that was infected with both LsRV-No9 and No127 strains. Treatment given at Nauplius I and pre-adult stage. Copepods (80/fish) were given to 6 fish, and sampled at 25 days post infestation. Pre-adult lice were given 600 ng/ul dsRNA by injection and sampled at 75 dpi. The offspring of these females were treated with dsRNA at Nauplius I and pre-adult stage as described above, and adult lice were sampled at 55 dpi.