Distribution and Genotyping of Infectious Hematopoietic Necrosis Virus in Farmed Rainbow Trout and Autochthonous Salmonids in North Macedonia
Infectious hematopoietic necrosis (IHN) is a common disease in the intensive production of salmonids. The IHN virus (IHNV) was isolated for the first time in North Macedonia in 2018. This study aimed to investigate the distribution and genotype of IHN in farmed rainbow trout and autochthonous salmon...
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Published in | Macedonian veterinary review Vol. 47; no. 1; pp. 37 - 43 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Sciendo
01.03.2024
Ss.Cyril and Methodius University, Skopje |
Subjects | |
Online Access | Get full text |
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Summary: | Infectious hematopoietic necrosis (IHN) is a common disease in the intensive production of salmonids. The IHN virus (IHNV) was isolated for the first time in North Macedonia in 2018. This study aimed to investigate the distribution and genotype of IHN in farmed rainbow trout and autochthonous salmonid fish in North Macedonia following the first detection. The samples were collected from 47 trout farms. Trout fry with or without clinical signs of IHN were selected as individual samples. Kidney, spleen, and heart were taken from each fish during the dissection. Three pooled samples were collected from each farm. A total of 141 pooled samples were collected: Rainbow trout (
) n=127, Macedonian trout (
) n=11, and Ohrid trout (
) n=3. The virus was detected in 43 samples (30.50%): rainbow trout (n=40), Macedonian trout (n=2), and Ohrid trout (n=1). There were 18 (38.30%) positive fish farms. The MAKIHNV1 isolate from 2018 (MN641902) and the newly isolated virus shared a similarity of >99 and were placed in clade E-1 of European genogroup E. The IHN has spread throughout the country and is also present in the autochthonous salmonids. |
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ISSN: | 1857-7415 1409-7621 1857-7415 |
DOI: | 10.2478/macvetrev-2024-0013 |