scholarly journals Comparative susceptibility and histopathology of the response of naive Atlantic. Chinook and coho salmon to experimental infection with Lepeophtheirus salmonis (Copepoda: Caligidae)

1992 ◽  
Vol 14 ◽  
pp. 179-193 ◽  
Author(s):  
SC Johnson ◽  
LJ Albright
Keyword(s):  
Experimental Infection ◽  
Coho Salmon ◽  
Lepeophtheirus Salmonis ◽  
Comparative Susceptibility

Viral Hemorrhagic Septicemia: Comparative Susceptibility of Rainbow Trout (Salmo gairdneri) and Hybrids (S. gairdneri × Oncorhynchus kisutch) to Experimental Infection

1976 ◽  
Vol 33 (5) ◽  
pp. 1205-1208 ◽  
Author(s):  
Wilma M. Ord ◽  
Monique Le Berre ◽  
Pierre de Kinkelin
Keyword(s):  
Rainbow Trout ◽  
Experimental Infection ◽  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Salmo Gairdneri ◽  
Viral Hemorrhagic Septicemia ◽  
Comparative Susceptibility

Rainbow trout (Salmo gairdneri) fry and yearlings were compared with hybrids of rainbow trout and coho salmon (Oncorhynchus kisutch) for susceptibility to viral hemorrhagic septicemia (VHS). In three trials, exposure to waterborne infectivity consistently resulted in a 77% mortality of rainbow trout fry while loss among the hybrid fry averaged only 11%. Tests showed survivors might be carriers of virus. Hybrid yearlings infected by gill brushing were fully refractory to VHS whereas mortality (3:8) and viremia were recorded among gill-infected rainbow trout yearlings.

Relation of Water Temperature to Flexibacter columnaris Infection in Steelhead Trout (Salmo gairdneri), Coho (Oncorhynchus kisutch) and Chinook (O. tshawytscha) Salmon

1975 ◽  
Vol 32 (9) ◽  
pp. 1553-1559 ◽  
Author(s):  
R. A. Holt ◽  
J. E. Sanders ◽  
J. L. Zinn ◽  
J. L. Fryer ◽  
K. S. Pilcher
Keyword(s):  
Water Temperature ◽  
Experimental Infection ◽  
Chinook Salmon ◽  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Disease Process ◽  
Salmo Gairdneri ◽  
Contact Method ◽  
Steelhead Trout ◽  
Time To Death

The effect of water temperature upon mortality from experimental infection by Flexibacter columnaris and on mean time to death was investigated in juvenile steelhead trout (Salmo gairdneri), coho salmon (Oncorhynchus kisutch), and spring chinook salmon (Oncorhynchus tshawytscha). Eight temperatures increasing from 3.9 to 23.3 C (39 to 74 F) by increments of 2.8 C (5 F) were studied. Fish were infected by the direct contact method whereby a suspension of the pathogen was added to the water. It was found that at temperatures of 9.4 C (49 F) and below, no deaths due to the experimental infection with F. columnaris occurred. At 12.2 C (54 F) mortality varied from 4 to 20% among the three species, and increased progressively with increasing temperature to 100% in steelhead trout and coho salmon at 20.5 C (69 F), and 70% in chinook salmon at that temperature. With all three salmonid species, an inverse linear relationship was found between water temperature and the log10 of the mean number of days from exposure to death. This means that as the temperature increased above 12.2 C (54 F), the disease process was progressively accelerated, resulting in a minimum time to death at 20.5 or 23.3 C (69 or 74 F) and a maximum at 12.2 C (54 F). The results indicate that under the conditions of these experiments, columnaris disease in salmonids was completely suppressed by water temperatures of 9.4 C (49 F) or below.

ACTIVE AND PASSIVE IMMUNIZATION OF CERTAIN SALMONID FISHES AGAINST AEROMONAS SALMONICIDA

1965 ◽  
Vol 11 (3) ◽  
pp. 397-405 ◽  
Author(s):  
K. D. Spence ◽  
J. L. Fryer ◽  
K. S. Pilcher
Keyword(s):  
Rainbow Trout ◽  
Causative Agent ◽  
Experimental Infection ◽  
Coho Salmon ◽  
Age Groups ◽  
Passive Immunization ◽  
Aeromonas Salmonicida ◽  
Salmonid Fishes ◽  
Passive Protection ◽  
Two Age Groups

Passive protection against Aeromonas salmonicida, the causative agent of furunculosis in fishes, was produced in juvenile coho salmon by administration of serum from adult rainbow trout containing antibodies actively produced by intra-abdominal vaccination.The levels of natural (or residual) agglutinins against A. salmonicida and those produced by vaccination are shown for two age-groups of rainbow trout.Oral vaccine administered in the diet of juvenile coho salmon failed to produce either agglutinating antibody or protection against experimental infection under the conditions employed.

Comparative Susceptibility of Atlantic (Salmo salar) and Coho (Oncorhynchus kisutch) Salmon to Three Strains ofVibrio anguillarum From The Maine – New Hampshire Coast

1979 ◽  
Vol 36 (3) ◽  
pp. 280-282 ◽  
Author(s):  
Evelyn S. Sawyer ◽  
Richard G. Strout ◽  
Bonita A. Coutermarsh
Keyword(s):  
Atlantic Salmon ◽  
Key Words ◽  
Salmo Salar ◽  
New Hampshire ◽  
Marine Bacteria ◽  
Coho Salmon ◽  
Vibrio Anguillarum ◽  
Oncorhynchus Kisutch ◽  
Comparative Susceptibility ◽  
Water Transmission

Atlantic salmon (Salmo salar) were found to be as susceptible as coho salmon (Oncorhynchus kisutch) to Maine–New Hampshire strains of Vibrio anguillarum used in both injection and water transmission exposure. Exposure to 1–2.5 × 105 organisms/mL of one strain (569) in the water for 1 h killed 80–100% of Atlantic salmon at 10 and 15 °C. Should similar water exposure conditions occur in Maine estuaries, newly released Atlantic salmon smolts may encounter lethal levels of V. anguillarum. Key words: Vibrio anguillarum, Salmo salar, Atlantic salmon, susceptibility, marine bacteria.

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