Spontaneous Nephroblastoma in a Rainbow Trout (Salmo gairdneri)

1973 ◽  
Vol 30 (4) ◽  
pp. 549-551 ◽  
Author(s):  
P. H. Odense ◽  
V. H. Logan ◽  
S. R. Baker
Keyword(s):  
Rainbow Trout ◽  
Kidney Disease ◽  
Clinical Signs ◽  
Salmo Gairdneri ◽  
Renal Tubules ◽  
Simultaneous Presence ◽  
Etiological Factors ◽  
Fibrous Stroma ◽  
First Case ◽  
Hatchery Stock

A neoplasm in a rainbow trout (Salmo gairdneri) identified as a nephroblastoma is described and its possible pathological implications discussed. The characteristic conditions of abortive renal tubules and glomeruli in a fibrous stroma were observed; however, metastases were absent. The simultaneous presence of inflammatory kidney disease made association of clinical signs with the neoplasm impossible. This is the first case of nephroblastoma in Canadian hatchery stock. The etiological factors are unknown.

Bacterial Kidney Disease in Feral Populations of Brook Trout (Salvelinus fontinalis), Brown Trout (Salmo trutta), and Rainbow Trout (Salmo gairdneri)

1979 ◽  
Vol 36 (11) ◽  
pp. 1370-1376 ◽  
Author(s):  
Douglas L. Mitchum ◽  
Loris E. Sherman ◽  
George T. Baxter
Keyword(s):  
Rainbow Trout ◽  
Kidney Disease ◽  
Brown Trout ◽  
Brook Trout ◽  
Salmo Trutta ◽  
Salmo Gairdneri ◽  
Age Classes ◽  
Bacterial Kidney Disease ◽  
Live Fish ◽  
Brown Trout Salmo Trutta

Incidence and effects of bacterial kidney disease (BKD) were determined in wild, naturally reproducing populations of brook trout (Salvelinus fontinalis), brown trout (Salmo trutta), and rainbow trout (Salmo gairdneri) in a small lake and stream system in southeastern Wyoming, USA where BKD epizootics have been observed since 1972. During 1976, dead fish were collected at three upstream stations, and 60 live fish were collected from each of 11 stations. All fish were necropsied, and virological, bacteriological, and parasitological examinations were conducted by standard methods. An indirect fluorescent antibody technique was used to detect the BKD organism in cultures and kidney tissue smears. Bacterial kidney disease was diagnosed in 100% of the dead brook trout collected. Incidence among live fish ranged from 83% at an upstream station to only 3% at the most downstream location, and was highest in brook trout and lowest in rainbow trout. Two longnose suckers (Catostomus catostomus), the only non-salmonids collected, were found negative for BKD. Clinical signs of infection and the most severe infections were found only in brook trout. Five age-classes of feral brook trout were involved in the epizootics. Since other known pathogens were essentially absent, it is believed that all deaths were due to BKD. Relationships between species susceptibility to BKD, age-classes, water chemistry and water temperatures, and certain ecological conditions are discussed. Key words: bacterial kidney disease, feral trout, epizootics, brook trout, brown trout, rainbow trout

Biochemical, Physiological, and Pathological Changes in Pyridoxine-Deficient Rainbow Trout (Salmo gairdneri)

1974 ◽  
Vol 31 (12) ◽  
pp. 1893-1898 ◽  
Author(s):  
Charlie E. Smith ◽  
Myron Brin ◽  
John E. Halver
Keyword(s):  
Rainbow Trout ◽  
Gastrointestinal Tract ◽  
Clinical Signs ◽  
Salmo Gairdneri ◽  
Glutamic Pyruvic Transaminase ◽  
Pathological Changes ◽  
Deficient Diet ◽  
Normochromic Anemia ◽  
Kidney Liver

Rainbow trout (Salmo gairdneri) fed a pyridoxine-deficient diet developed clinical signs of the deficiency after 8 wk of feeding. Erythrocyte and muscle glutamic pyruvic transaminase (GPT) concentrations were significantly depressed in deficient fish, while liver GPT was significantly elevated. Liver GPT was also elevated in starved trout suggesting the increase in enzyme concentrations was secondary to the deficiency. A normocyte, normochromic anemia, which responded favorably to pyridoxine, developed in pyridoxine-deficient trout. Microscopic lesions were found in gastrointestinal tract, kidney, liver, pancreas, and thymus of deficient fish.

Further consideration of the haematology of proliferative kidney disease (PKD) in rainbow trout, Salmo gairdneri Richardson

1987 ◽  
Vol 10 (6) ◽  
pp. 435-444 ◽  
Author(s):  
R. S. CLIFTON-HADLEY ◽  
R. H. RICHARDS ◽  
D. BUCKE
Keyword(s):  
Rainbow Trout ◽  
Kidney Disease ◽  
Salmo Gairdneri ◽  
Proliferative Kidney Disease

First Record of Bacterial Kidney Disease in an Apparently Wild Salmonid in British Columbia

1973 ◽  
Vol 30 (10) ◽  
pp. 1578-1580 ◽  
Author(s):  
T. P. T. Evelyn ◽  
G. E. Hoskins ◽  
G. R. Bell
Keyword(s):  
British Columbia ◽  
Rainbow Trout ◽  
Kidney Disease ◽  
First Record ◽  
Wild Fish ◽  
Salmo Gairdneri ◽  
Bacterial Kidney Disease ◽  
Causative Bacterium

A confirmed case of bacterial kidney disease in a sports-caught rainbow trout (Salmo gairdneri) from Loon Lake, British Columbia, is reported. The case represents the first record of this disease in an apparently wild fish in this province. Descriptions of the affected trout and of the causative bacterium are provided.

Proliferative kidney disease (PKD) in rainbow trout Salmo gairdneri: Further observations on the effects of water temperature

Aquaculture ◽  
1986 ◽  
Vol 55 (3) ◽  
pp. 165-171 ◽  
Author(s):  
R.S. Clifton-Hadley ◽  
R.H. Richards ◽  
D. Bucke
Keyword(s):  
Rainbow Trout ◽  
Kidney Disease ◽  
Water Temperature ◽  
Salmo Gairdneri ◽  
Proliferative Kidney Disease

Transmission of Bacterial Kidney Disease from Wild to Stocked Hatchery Trout

1981 ◽  
Vol 38 (5) ◽  
pp. 547-551 ◽  
Author(s):  
Douglas L. Mitchum ◽  
Loris E. Sherman
Keyword(s):  
Rainbow Trout ◽  
Kidney Disease ◽  
Brown Trout ◽  
Disease Transmission ◽  
Brook Trout ◽  
Salmo Trutta ◽  
Horizontal Transmission ◽  
Wild Fish ◽  
Salmo Gairdneri ◽  
Bacterial Kidney Disease

Natural, horizontal transmission of bacterial kidney disease (BKD) from infected wild brook trout (Salvelinus fontinalis) to newly stocked hatchery brook trout, brown trout (Salmo trutta), and rainbow trout (Salmo gairdneri) was shown in a small lake and stream system in southeastern Wyoming, USA. Stocked trout were infected naturally and died in 9 mo or less after exposure to infected wild fish. Dead and live fish collected from each of three stations were necropsied. Fluorescent antibody techniques (FAT) were used to detect the BKD organism in all samples. Low severity infections were often detected by FAT at a higher rate when feces were examined as compared to kidney tissues from the same fish. Because other known pathogens were essentially absent, BKD was diagnosed as the cause of all deaths in both stocked hatchery fish and wild fish. Rainbow trout were found to be the most refractory species.Key words: bacterial kidney disease, natural disease transmission, wild trout, brook trout, brown trout, rainbow trout, epizootics

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