Different prevalences of Renibacterium salmoninarum detected by ELISA in Alaskan chinook salmon Oncorhynchus tshawytscha spawned from freshwater and seawater.
Soluble antigen of Renibacterium salmoninarum (Rs) was detected by a polyclonal enzyme-linked immunosorbent assay (ELISA) at significantly higher prevalences in adult chinook salmon Oncorhynchus tshawytscha that matured in freshwater than in the same cohort of fish spawned after maturation in seawater. The cumulative results were consistent during 4 yr of comparison at the Little Port Walter Hatchery on Baranof Island, Alaska, USA. Possible causes for this difference are discussed. Maturation of chinook salmon broodstock in seawater has become a practical strategy at this hatchery to reduce the prevalence of Rs-positive parent fish and the numbers of culled eggs.
Meyers
T R
TR
Alaska Department of Fish and Game, Commercial Fisheries Division, Juneau 99802-5526, USA. fishpath%fishgame@state.ak.us
Thrower
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Short
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Lipson
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Joyce
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Farrington
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Doherty
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D000413:Alaska / Q000453:epidemiology; D000818:Animals; D000942:Antigens, Bacterial / Q000032:analysis; D015331:Cohort Studies; D004797:Enzyme-Linked Immunosorbent Assay / Q000662:veterinary; D005393:Fish Diseases / Q000453:epidemiology*; D005398:Fisheries; D019085:Fluorescent Antibody Technique, Direct / Q000662:veterinary; D005618:Fresh Water; D006094:Gram-Positive Bacteria / Q000276:immunology* / Q000302:isolation & purification; D016908:Gram-Positive Bacterial Infections / Q000453:epidemiology / Q000662:veterinary*; D015995:Prevalence; D012474:Salmon; D012623:Seawater
D000942:Antigens, Bacterial