The viral hemorrhagic septicemia (VHS) is a well known disease of salmonid fish and causes great economical losses, especially in rainbow trout farms. To date, only the detection of the augmentable virus count as a positive result for the presence of the disease. However, for the observation of VHS serological methods as indirect verification would be more advantageous. For a long time serological methods are well established for the indirect detection of viral diseases in mammals. Concerning fish, only few serological tests are described to detect VHS. For the validation of serological tests...