scholarly journals Immersion vaccines against Yersinia ruckeri infection in rainbow trout: Comparative effects of strain differences

2021 ◽  
Author(s):  
He Yang ◽  
Ding Zhujin ◽  
Moonika H. Marana ◽  
Inger Dalsgaard ◽  
Jaafar Rzgar ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Strain Differences ◽  
Yersinia Ruckeri

scholarly journals Immune Response of Rainbow Trout (Oncorhynchus mykiss) to Selected Antigens of Yersinia ruckeri

2009 ◽  
Vol 78 (1) ◽  
pp. 145-150 ◽  
Author(s):  
Unal Ispir ◽  
H. Bayram Gokhan ◽  
Mikail Ozcan ◽  
Mustafa Dorucu ◽  
Naim Saglam
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Metabolic Activity ◽  
Control Fish ◽  
Phagocytic Index ◽  
Control Group ◽  
Yersinia Ruckeri ◽  
Whole Cells ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Fish Group

In this study, effects of Yersinia ruckeri antigens on the immune mechanisms of rainbow trout (Oncorhynchus mykiss) were examined. The weight of the 120 fish used in this study was 20–30 g. After injecting 1 mg of formalin-inactivated whole cells (FKC) and O-antigen (Ag-O) intraperitoneally, blood was taken from the caudal vein of anaesthetized fish and metabolic activity of leukocytes (Nitroblue tetrazolium (NBT) activities), phagocytic activity (PA), phagocytic index (PI), serum protein and serum total immunoglobulin (TIg) levels were determined on day 30 after the first immunization. The same procedure was conducted in the control group. In all the experimental groups, considerable increases in the immune indicators were found and significant differences detected between the control and experimental groups (p < 0.05). Metabolic activity of leukocytes decreased significantly (p < 0.05) during the following treatment with antigens compared to the control fish group.

Propagated Fish in Resource Management

2004 ◽  
Keyword(s):  
Rainbow Trout ◽  
Infectious Hematopoietic Necrosis Virus ◽  
Fish Populations ◽  
Whirling Disease ◽  
Yersinia Ruckeri ◽  
Myxobolus Cerebralis ◽  
Infectious Hematopoietic Necrosis ◽  
Tetracapsuloides Bryosalmonae ◽  
Parasite Challenge

<em>Abstract.</em>—Laboratory challenges of two rainbow trout <em>Oncorhynchus mykiss </em>strains with <em>Myxobolus cerebralis </em>triactinomyxons confirm the resistance to whirling disease of the Hofer trout strain. Although the number of fish that became infected and developed clinical disease was similar for the Hofer and the Trout Lodge strains at all challenge doses, the median spore numbers were lower at all challenge doses for the Hofer rainbow trout. Parasite challenge doses required to produce lesions of high severity were 10-fold lower for the Trout Lodge strain (100 triactinomyxons) than the Hofer strain (1,000 triactinomyxons). Challenges of the Hofer strain with other common salmonid pathogens; the myxozoans <em>Ceratomyxa shasta </em>and <em>Tetracapsuloides bryosalmonae</em>, the bacterium <em>Yersinia ruckeri</em>, and the viruses Salmonid herpes-like virus type 1 and infectious hematopoietic necrosis virus demonstrate that the susceptibility of the Hofer strain was similar to what would be expected for other strains of rainbow trout, either domestic or wild. These pathogen challenges provide evidence that the Hofer trout present a low risk for introducing any pathogen that might be detrimental to native or established fish populations or further amplifying those that are endemic.

Booster immersion vaccination using diluted Yersinia ruckeri bacterin confers protection against ERM in rainbow trout

Aquaculture ◽  
2015 ◽  
Vol 440 ◽  
pp. 1-5 ◽  
Author(s):  
Jiwan Kumar Chettri ◽  
Rzgar Mohammad Jaafar ◽  
Jakob Skov ◽  
Per Walter Kania ◽  
Inger Dalsgaard ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Yersinia Ruckeri

Effects of fish size and route of infection on virulence of a Danish Yersinia ruckeri O1 biotype 2 strain in rainbow trout (Oncorhynchus mykiss)

Aquaculture ◽  
2019 ◽  
Vol 503 ◽  
pp. 519-526 ◽  
Author(s):  
Maki Ohtani ◽  
Kasper Rømer Villumsen ◽  
Helene Kragelund Strøm ◽  
Anne Hjørngaard Lauritsen ◽  
Bent Aalbæk ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Yersinia Ruckeri ◽  
Fish Size ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Route Of Infection
Sign in / Sign up

Export Citation Format

Share Document