Monitoring for early detection of Aeromonas salmonicida to enhance antibiotic therapy and control furunculosis in Atlantic salmon
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Abstract
Juvenile Atlantic salmon Salmo salar at the White River National Fish Hatchery were monitored quarterly for Aeromonas salmonicida, the etiologic agent of furunculosis. Samples were obtained in August, November, January, and March, within an 8‐month smolt production cycle during 1992–1993. Aeromonas salmonicida was isolated in August from external mucus and kidneys of fish within six production pools, each containing about 7,500 fish. Topical disinfection with a 60‐min bath of Chloramine‐T at 15 mg/L on three consecutive days did not control the prevalence of infection. Atlantic salmon were then fed 77.0 mg of oxytetracycline per kilogram of fish for 10 d. Mortality subsided in all tanks within 4 d after initiation of oral antibiotic therapy. Further examination failed to isolate the pathogen 21 d after cessation of treatment. In November, A. salmonicida was detected in the mucus of one fish from a single tank; treatment was not prescribed. Pathogens were not detected shortly after fish were marked with coded wire tags in January or prior to release in March. Monitoring programs allowed early detection of the pathogen; this led to treatment that permitted fish to be stocked in accordance with established fish health policy regulations for salmonids in New England.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Monitoring for early detection of Aeromonas salmonicida to enhance antibiotic therapy and control furunculosis in Atlantic salmon |
| Series title | Progressive Fish-Culturist |
| DOI | 10.1577/1548-8640(1996)058%3C0203:MFEDOA%3E2.3.CO;2 |
| Volume | 58 |
| Year Published | 1996 |
| Language | English |
| Publisher | Oxford Academic |
| Contributing office(s) | Leetown Science Center |
| Description | 6 p. |
| First page | 203 |
| Last page | 208 |