Pathological Findings in Rainbow Trout (Oncorhynchus mykiss Walbaum, 1792) Experimentally Infected with Yersinia ruckeri

Hamdi AVCI; S. Serap BİRİNCİOĞLU

Makale detayları

Pathological Findings in Rainbow Trout (Oncorhynchus mykiss Walbaum, 1792) Experimentally Infected with Yersinia ruckeri

Yazarlar:

Hamdi AVCI | S. Serap BİRİNCİOĞLU

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 2005 Vol.29 Issue 6, pp.1321-1328

Belge Tipi:

Makale

Yayın Tarihi:

5/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000768639

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128

Anahtar kelimeler:

Özet:

 

The aim of this study was to evaluate the pathological findings in rainbow trout experimentally infected with Yersinia ruckeri. For this purpose, 42 [1 control group (10 fish) and 1 experimental group (32 fish)] of rainbow trout were used. Yersinia ruckeri serotype I (R0072) at a concentration of 3 x 106 cfu/ml (0.1 ml per fish) was intraperitoneally injected into the experimental group, whereas the control group was subjected to the same volume of sterile saline. Following the intraperitoneal injection, between 4 and 26 days, fish that died due to natural infection and those killed were necropsied and macroscopic and microscopic findings were determined.  Macroscopically, in the acute form, hyperemia and hemorrhages were observed, especially at the base of the fins, around the anus and eyes, on the swim bladder and in the gills. In the chronic form, dark pigmentation or depigmentation of the skin and yellow-grayish discoloration in the liver were noted. In addition, the kidney and spleen were dark in color and smaller than those observed in the control fish. Microscopically, in the acute form, edema, hyperemia, hemorrhage and desquamation of the epithelial cells in the secondary lamellae and a significant decrease in the numbers of lymphoid cells in the kidney were seen. In the spleen, focal necrosis was the most important microscopic finding. In the chronic form, hyperplasia of the interlamellar cells of the primary lamellae, fatty changes in the liver and many large mononuclear cell proliferations with slightly incised nucleus in the hemopoietic tissue of the kidney were observed.  This is the first pathological study on rainbow trout experimentally infected with Yersinia ruckeri in Turkey.

 

The aim of this study was to evaluate the pathological findings in rainbow trout experimentally infected with Yersinia ruckeri. For this purpose, 42 [1 control group (10 fish) and 1 experimental group (32 fish)] of rainbow trout were used. Yersinia ruckeri serotype I (R0072) at a concentration of 3 x 106 cfu/ml (0.1 ml per fish) was intraperitoneally injected into the experimental group, whereas the control group was subjected to the same volume of sterile saline. Following the intraperitoneal injection, between 4 and 26 days, fish that died due to natural infection and those killed were necropsied and macroscopic and microscopic findings were determined.  Macroscopically, in the acute form, hyperemia and hemorrhages were observed, especially at the base of the fins, around the anus and eyes, on the swim bladder and in the gills. In the chronic form, dark pigmentation or depigmentation of the skin and yellow-grayish discoloration in the liver were noted. In addition, the kidney and spleen were dark in color and smaller than those observed in the control fish. Microscopically, in the acute form, edema, hyperemia, hemorrhage and desquamation of the epithelial cells in the secondary lamellae and a significant decrease in the numbers of lymphoid cells in the kidney were seen. In the spleen, focal necrosis was the most important microscopic finding. In the chronic form, hyperplasia of the interlamellar cells of the primary lamellae, fatty changes in the liver and many large mononuclear cell proliferations with slightly incised nucleus in the hemopoietic tissue of the kidney were observed.  This is the first pathological study on rainbow trout experimentally infected with Yersinia ruckeri in Turkey.

Makale detayları

Pathological Findings in Rainbow Trout (Oncorhynchus mykiss Walbaum, 1792) Experimentally Infected with Yersinia ruckeri

Yazarlar: Hamdi AVCI | S. Serap BİRİNCİOĞLU

Yayıncı: TUBITAK

Dergi: Turkish Journal of Veterinary and Animal Sciences 2005 Vol.29 Issue 6, pp.1321-1328

Belge Tipi: Makale

Yayın Tarihi: 5/2005

Belge Dili: Türkçe

Document ID (Org No.): 2000768639

Sıklık: İki Aylık

eISSN: 1303-6181

pISSN: 1300-0128

Yersinia ruckeri

rainbow trout

pathological findings

Sayı

Yazarlar:

Hamdi AVCI | S. Serap BİRİNCİOĞLU

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Veterinary and Animal Sciences 2005 Vol.29 Issue 6, pp.1321-1328

Belge Tipi:

Makale

Yayın Tarihi:

5/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000768639

Sıklık:

İki Aylık

eISSN:

1303-6181

pISSN:

1300-0128