Renibacterium salmoninarum in spring-summer Chinook salmon smolts at dams on the Columbia and Snake Rivers

Journal of Aquatic Animal Health
By: , and 



We evaluated Renibaeterium salmoninarum infection in smolts of hatchery and wild spring-summer Chinook salmon Oncorhynchus tshawytscha sampled during most of the outmigration at Little Goose (1988) and Lower Granite dams (1988–1991) on the Snake River and at Priest Rapids and McNary dams on the Columbia River (1988–1990). We sampled 860–2,178 fish per dam each year. Homogenates of kidney–spleen tissue from all fish were tested for the presence of R. salmoninarum antigens by the enzyme-linked immunosorbent assay (ELISA), and homogenates from 10% of the fish were examined by the fluorescent antibody technique (FAT). Although only 1–11% of fish sampled at a given dam during any l year exhibited lesions characteristic of bacterial kidney disease, 86–100% of the fish tested positive for R. salmoninarum antigen by ELISA, whereas 4–17% of the fish tested positive by the FAT. During most years, a majority (68–87%) of fish testing positive by the ELISA had low R. salmoninarum antigen levels, but in 1989, 53% of positive fish from Lower Granite Dam and 52% from McNary Dam showed medium-to-high antigen levels. For most years, the highest mean antigen levels were measured in fish sampled after 75% of the total out-migrants had passed a given dam. When the largest numbers of fish were being collected for bypass or downriver transportation, mean antigen levels were relatively low.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Renibacterium salmoninarum in spring-summer Chinook salmon smolts at dams on the Columbia and Snake Rivers
Series title Journal of Aquatic Animal Health
DOI 10.1577/1548-8667(1997)009<0114:RSISSC>2.3.CO;2
Volume 9
Issue 2
Year Published 1997
Language English
Publisher Taylor & Francis
Contributing office(s) Western Fisheries Research Center
Description 13 p.
First page 114
Last page 126
Country United States
State Washington
Other Geospatial Columbia River, Little Goose Dam, Lower Granite Dam, McNary Dam. Priest Rapids Dam. Snake River
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