Relation of water temperature to infections of coho salmon (Oncorhynchus kisutch), chinook salmon (O. tshawytscha), and steelhead trout (Salmo gairdneri) with Aeromonas salmonicida and A. hydrophila
Journal Article
·
· J. Fish. Res. Board Can.; (United States)
Juvenile steelhead trout (Salmo gairdneri), coho salmon (Oncorhynchus kisutch), and spring chinook salmon (O. tshawytscha) were infected by intraperitoneal or intramuscular injection with Aeromonas salmonicida or A. hydrophila at seven temperatures from 3.9 to 20.5/sup 0/C. At 3.9 and 6.7/sup 0/C, mortality in fish infected with A. salmonicida varied from 2 to 26% among the three salmonid species. At 20.5/sup 0/C 93 to 100% of these animals died within 2 or 3 days; at 6.7/sup 0/C or lower the fish survived for 12 to 23 days. Growth of A. salmonicida in vitro was influenced by temperature in a manner very similar to its influence on the in vivo infection. Comparable experiments with A. hydrophila gave results much like those with A. salmonicida, though some differences were noted. At a temperature of 20.5/sup 0/C percent mortality ranged from 64 to 100%. At 9.4/sup 0/C or below no deaths attributed to A. hydrophila occurred. Fatally infected fish died more rapidly at the higher temperatures.
- Research Organization:
- Oregon State Univ., Corvallis
- OSTI ID:
- 5110632
- Journal Information:
- J. Fish. Res. Board Can.; (United States), Journal Name: J. Fish. Res. Board Can.; (United States) Vol. 35:1; ISSN JFRBA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
550900 -- Pathology
560205* -- Thermal Effects-- Vertebrates-- (-1987)
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
AQUATIC ORGANISMS
BACTERIA
BIOLOGICAL STRESS
DISEASES
FISHES
INFECTIOUS DISEASES
MICROORGANISMS
MORTALITY
PATHOGENESIS
SALMON
TEMPERATURE EFFECTS
TROUT
VERTEBRATES
560205* -- Thermal Effects-- Vertebrates-- (-1987)
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
AQUATIC ORGANISMS
BACTERIA
BIOLOGICAL STRESS
DISEASES
FISHES
INFECTIOUS DISEASES
MICROORGANISMS
MORTALITY
PATHOGENESIS
SALMON
TEMPERATURE EFFECTS
TROUT
VERTEBRATES