Morphological examination of gyrodactylids tken from fins of farmed rainbow trout, Oncorhynchus mykiss in Portugal showed that these fish were infected with Gyrodactylus salaris. Hybridisation of DNA probes specific for G. salaris, G. derjavini and G. truttae amplified from the Portuguese gyrodactylids also identified G. salaris. These results represent the first recorded occurrence of G. salaris in Portugal.
The first identification of G. salaris in France was made at the EU Workshop on Gyrodactylus salaris held in Oulu, Finland in April 1996. Gyrodactylus specimens from heavily infected farmed rainbow trout were provided by Dr F Baudin-Laurencin, CNEVA, Brest. The morphology of these specimens was examined during the workshop by Dr T A Mo, Central Veterinary Laboratory, Oslo, Norway. DNA probe examinations were carried out at the SOAEFD Marine Laboratory by Dr C O Cunningham. Both methods identified the specimen as G. salaris.
[ Database manager's comment.This identification of G. salaris in France has since been refuted(see reference Lautraite et al. (1999) who claim that the parasite was misidentified and is, instead, a new species of Gyrodactylus(G. teuchis)which shares several morphological and molecular characters with G. salaris. ]