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 · Sun Jan 01 00:00:00 EST 1978 · J. Fish. Res. Board Can.; (United States)

DOI:https://doi.org/10.1139/f78-001· OSTI ID:5110632

Groberg, Jr, W J; McCoy, R H; Pilcher, K S; Fryer, J L

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), Vol. 35:1
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
59 BASIC BIOLOGICAL SCIENCES
FISHES
TEMPERATURE EFFECTS
BACTERIA
BIOLOGICAL STRESS
INFECTIOUS DISEASES
MORTALITY
PATHOGENESIS
SALMON
TROUT
ANIMALS
AQUATIC ORGANISMS
DISEASES
MICROORGANISMS
VERTEBRATES
560205* - Thermal Effects- Vertebrates- (-1987)
550900 - Pathology