Streptococcus iniae type II infections in rainbow trout Oncorhynchus mykiss

D. Lahav; M. Eyngor; A. Hurvitz; C. Ghittino; A. Lublin; A. Eldar

doi:10.3354/dao062177

DAO

Diseases of Aquatic Organisms

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DAO 62:177-180 (2004) - doi:10.3354/dao062177

Streptococcus iniae type II infections in rainbow trout Oncorhynchus mykiss

D. Lahav¹, M. Eyngor², A. Hurvitz³, C. Ghittino⁴, A. Lublin², A. Eldar^2,*

¹Department of Pathology, and ²Department of Poultry and Fish Diseases, Kimron Veterinary Institute,POB 12, 50250 Bet-Dagan, Israel
³Dan Fish Farm, Kibbutz Dan, 12245 Upper Galilee, Israel
⁴Department of Fish Pathology, IZS–State Veterinary Institute, 06126 Perugia, Italy

*Corresponding author. Email: eldar@int.gov.il

ABSTRACT: Clinical and pathological findings (anorexia, hemorrhage, lethargy, loss of orientation and exophthalmia) indicated that Streptococcus iniae type II is responsible for a fatal disease in rainbow trout. Histopathological findings revealed that S. iniae type II produces a systemic disease, including a diffuse necrotizing myositis. The distribution of viable bacteria in infected tissues substantiated the pathological findings, confirming that S. iniae type II is responsible for a generalized septic disease of rainbow trout.

KEY WORDS: Rainbow trout · Streptococcus iniae · Serotype · Pathology

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DAO 62:177-180 (2004) - doi:10.3354/dao062177

Streptococcus iniae type II infections in rainbow trout Oncorhynchus mykiss

D. Lahav1, M. Eyngor2, A. Hurvitz3, C. Ghittino4, A. Lublin2, A. Eldar2,*

D. Lahav¹, M. Eyngor², A. Hurvitz³, C. Ghittino⁴, A. Lublin², A. Eldar^2,*