Experiments were designed to more precisely evaluate the effects of water temperature on the progress of bacterial kidney disease ( BKD) in three species of salmonid fishes. Infections were produced by intraperitoneal injection of suspensions of the causative organism into fish held at seven temperatures ranging from 3.9 to 20.5°C....
The antigens of eight isolates of Renibacterium
salmoninarum were compared serologically using
immunoelectrophoretic techniques. Seven common antigens
were identified by their electrophoretic mobilities in each
antigenic profile. One of these common antigens, designated
Fr 21-30, was partially purified by ammonium sulfate
precipitation and gel filtration. Cross adsorption analysis
showed Fr...
Twenty-two isolates of Flexibacter columnaris were
collected from different species of fish from a wide
geographic range. Shieh medium was selected and modified
to provide satisfactory growth of F. columnaris strains.
Although there were three phenotypic variations in colony
morphology among the strains observed, the environmental
and biochemical characteristics as...
This investigation was initiated in an attempt to delineate
some factors affecting the adsorption of poliovirus to soil particles
in seawater. The results could have significance in the development
of assay procedures for viral contaminants in natural waters.
A sample of marine sediment, obtained from an estuary near
Purdy, Washington,...
Persistent infections with infectious pancreatic necrosis virus
(IPNV) were established in two salmonid cell lines and in live brook
trout. Virus inocula containing high concentrations of defective
interfering IPNV enhanced but were not a requirement for the establishment
of persistent infections in cell lines derived from steelhead
trout (STE-137) and...