[A new intracellular protozoon of Salmo gairdneri Richardson, 1836 (teleost fish). Taxonomic affinities]. / Un nouveau Protiste intracellulaire chez Salmo gairdneri Richardson, 1836 (poisson téléostéen). Affinités systématiques.

Macrophages of 1+ rainbow trout are parasitised by an unknown protozoan. An ultrastructural study permits to associate it with the genus Dermocystidium described in many fishes. This protozoan is characterized by a large vacuole of mitochondrial origin and by concentric structured bodies.