| ultrastructure of spironucleus salmonis n. comb. (formerly octomitus salmonis sensu moore 1922, davis 1926, and hexamita salmonis sensu ferguson 1979), with a guide to spironucleus species. | diplomonad flagellates can be associated with significant morbidity and mortality in fishes, particularly in farmed salmonids. diagnosis using only light microscopy is limited, and species cannot be confirmed. we therefore undertook a comprehensive transmission electron microscopy study of 20 trophozoites from the intestine of farmed juvenile rainbow trout oncorhynchus mykiss from northern ireland (reported as hexamita salmonis by ferguson in 1979). re-assignment to the genus spironucleus was de ... | 2004 | 15352524 |