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G.W. Klontz

Publications and source records attributed to G.W. Klontz.

7 recordsLinked to original sources
USGS2006

Virus diseases of salmonidae in the western United States. II. Aspects of pathogenesis

During the 10 to 15 years investigators from Europe and eastern United States have reported fish diseases of virus etiology. Rucker et al. in 1953 were the first to report a disease of possible virus origin in fish in the western United States. Since then many workers in the western states have described various epizootics caused by transmissible and filterable agents. The etiology and pathology of epizootics reported to date have been three viral diseases: (1) specific for sockeye salmon (Onchorhynchus nerka), (2) specific for chinook salmon (O. tshawytacha); and (3) isolated from rainbow trout (Salmo gairdneri). brook trout (Salvalinus fontinalis). and cutthroat trout ( Salmo clarkii). The most recent historical, etiological and morphological study of diseases of viral and possible viral origin occurring the West has been reported in detail by Parisot et al. With the exception of two investigations, histopathological accounts have been brief and cursory and, to date, pathogenesos of these viral diseases have not been recorded. This study was undertaken to initiate a series concerning pathogeneses of infectious diseases of salmonids. The two viral diseases covered in this paper are the Oregon sockeye disease (OSD) and Sacramento River chinook disease (SRCD). Some preliminary data on pathology of the corresponding material from the hatchery epizootics will also be described and discussed.

Annals of the New York Academy of Sciences↗
USGS1971

A procedure for testing the antigenicity of vaccines for immunization of fish against Furunculosis

Furnunculosis, a bacterial disease caused by Aeromonas salmonicida, is potentially one of the most devastating diseases in trout and salmon hatcheries. The disease may be controlled by three methods. The most frequently used method of control has been drug therapy. Unfortunately, the bacteria often develop resistance to the specific antibacterial drug. For example, sulfamerazine has been used widely to control furunculosis as well as other diseases. With repeated use in a population of fish, however, the bacteria soon develop resistance to the drug, thus rendering it ineffective in controlling the disease. In addition, drug therapy usually provides only temporary control and recurrences of the diseaseare very common.

Progressive Fish-Culturist↗
USGS1962

Intraspecific differences in serum antigens of red salmon demonstrated by immunochemical methods

The sera of most Alaskan red salmon ( Oncorhynchus nerka Walbaum) were found to contain at least 14 antigenic components when tested by the double diffusion precipitin analysis method of Ouchterlony with antisera prepared in rabbits. Two of these components, designated antigens I and II, were missing from 116 of 125 blood samples from red salmon taken in Asian waters. In contrast, only 31 of 905 blood samples from red salmon of American origin lacked these components. Intermediate frequencies of occurrence of these antigenic components were found in blood samples from red salmon caught in the central North Pacific and Bering Sea. The results are considered indicative of the intermingling of Asian and American stocks of red salmon in these al-ol An additional antigen (or antigens) was found which occurs in the sera of only mature or maturing female red salmon.

International North Pacific Fisheries Commission B↗
USGS1961

Blood types in Pacific salmon

Intraspecific differences in erythrocyte antigens (blood types) were shown to occur in four species of Pacific salmon, the sockeye or red salmon ( Oncorhynchus nerka ), the chinook or king salmon ( 0. tshawytsch a), the chum salmon ( O. keta ), and the pink salmon ( O. gorbuscha ). Antisalmon-erythrocyte sera prepared in rabbits and chickens were used after absorption of species-specific antibodies. Some of these blood types were shown to differ in their frequency of occurrence between different geographic races. In addition, isoimmunizations were conducted on one race of sockeye salmon. Antisera of seven different specificities were prepared and at least eight different patterns of antigenic composition were displayed by the cells tested. These results indicate that considerable antigenic diversity exists in salmon. Reagents to detect valuable markers for the investigation of geographic races of salmon should be obtained through further research.

International North Pacific Fisheries Commission B↗