Mycose viscérale de Poissons dulçaquicoles tropicaux.

Abstract

Mycose viscérale de Poissons dulçaquicoles tropicaux. Note préliminaire par G. CHAUVIER

An unusual form of Ichthyophonus hoferi (Ichthyophonales: Ichthyophonaceae) from yellowtail flounder Limanda lerruginea from the Nova Scotia shelf

“…has been reported from a wide variety of host species including crustaceans (see Reichenbach-Klinke 1957, Sindermann 1970, fishes (see Reichenbach-Klincke 1973, Wolke 1975, Neish & Hughes 1980, Lauckner 1984, amphibians (Chauvier 1979, Herman 1984, reptiles (Chauvier 1979), and birds (Chauvier & MortierGabet 1984). Examination of the many studies on the morphology, life history, and developmental patterns of I. hoferi, or what is considered to be this pathogen from both freshwater and marine fish tissues reveals that the above-mentioned features of what is supposed to be the same species are highly variable.…”

A novel clade of protistan parasites near the animal-fungal divergence.

“…hoferi causes systemic infections in more than 80 species of fish, both marine and freshwater, producing widespread mortalities and significant economic losses (20). The genus has variously been assigned to the Sporozoa (21), Haplosporidea (22), Myxosporidea (23), Oomycetes (24), Chytridiomycetes (25), Zygomycetes (26), Fungi Imperfecti (27), Fungi incertae sedis (28), and its own class Ichthyophonales (29) within the fungi. I. hoferi (25) resembles eumycota in possessing spindle pole bodies, but its mitochondria have tubulovesiculate, not flat, cristae (Fig.…”

Premières observations du pouvoir pathogène d’Ichthyophonus pour des oiseaux.

“…Nous avons précédemment fait connaître, dans cette même Revue, nos observa tions sur Tichthyophonose des poissons et sur le cycle biologique du parasite (1,2). Ailleurs, nous avons signalé l'existence de la maladie dans deux espèces différentes de Reptiles, toutes deux ichthyophages, la tortue matamata (Chelys fimbriatus) et l'alligator (Alligator mississippiensis) (3,4).…”