| 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 |
| ultrastructure and molecular diagnosis of spironucleus salmonis (diplomonadida) from rainbow trout oncorhynchus mykiss in germany. | diplomonad flagellates infect a wide range of fish hosts in aquaculture and in the wild in north america, asia and europe. intestinal diplomonad infection in juvenile farmed trout can be associated with morbidity and mortality, and in germany, diplomonads in trout are commonly reported, and yet are poorly characterised. we therefore undertook a comprehensive study of diplomonads from german rainbow trout oncorhynchus mykiss, using scanning and transmission electron microscopy, and sequencing of ... | 2007 | 17523542 |
| wild arctic char salvelinus alpinus and trout salmo trutta: hosts and reservoir of the salmonid pathogen spironucleus salmonicida (diplomonadida; hexamitidae). | spironucleus salmonicida is a diplomonad flagellate known to cause systemic infections in farmed salmonids. in northern norway, outbreaks of spironucleosis in farmed atlantic salmon salmo salar have been a recurring problem. common to all these outbreaks was the origin of smolts: all came from the same farm. in the present study, wild arctic char salvelinus alpinus and brown trout salmo trutta were sampled from the lakes used as a water source for the smolt supplier. in addition, smolt and three ... | 2011 | 22235595 |
| intestinal ph profile in rainbow trout oncorhynchus mykiss and microhabitat preference of the flagellate spironucleus salmonis (diplomonadida). | in farmed rainbow trout oncorhynchus mykiss, the flagellate spironucleus salmonis (diplomonadida) is often found in the pyloric region of the intestine. while previous in vitro studies report a ph of 7.5 to 8.0 as optimal for presumed s. salmonis, no previous in vivo studies have investigated the relationship between ph and microhabitat preference. therefore, in 698 rainbow trout (75% were 5 to 6 mo old juveniles, 10 to 20 cm total length), we recorded occurrence and density of s. salmonis, and ... | 2007 | 17803110 |