Abstract
Formalin killed bacteria were used as a vaccine against Streptococcus iniae infections in farmed rainbow trout. A single intraperitoneal injection of this vaccine in trout resulted in specific antibody production detectable for 6 months. Trout vaccinated at 50 g were protected under laboratory (experimental disease) and field conditions (natural disease) for at least 4 months against S. iniae infection. Passive transfer of S. iniae specific antibodies conferred protection. Under field conditions, mortality of non vaccinated trout exceeded 50%, whereas mortality of vaccinated trout did not reach 5%. In addition, vaccinated trout under field conditions gained 20% weight when compared with non vaccinated fish.
Original language | English |
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Pages (from-to) | 175-183 |
Number of pages | 9 |
Journal | Veterinary Immunology and Immunopathology |
Volume | 56 |
Issue number | 1-2 |
DOIs | |
State | Published - May 1997 |
Keywords
- Antibody response
- Fish streptococcosis
- Onchorynkus mykiss
- Protection
- Rainbow trout
- Streptococcus iniae
- Vaccine