<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>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 (<italic>Oncorhynchus mykiss</italic>) n=127, Macedonian trout (<italic>Salmo macedonicus</italic>) n=11, and Ohrid trout (<italic>Salmo letnica</italic>) 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.</p>
</abstract>

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 (Oncorhynchus mykiss) n=127, Macedonian trout (Salmo macedonicus) n=11, and Ohrid trout (Salmo letnica) 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.

Distribution and Genotyping of Infectious Hematopoietic Necrosis Virus in Farmed Rainbow Trout and Autochthonous Salmonids in North Macedonia

Ss. Cyril and Methodius University in Skopje

Macedonian Veterinary Review

This work is licensed under the Creative Commons Attribution 4.0 International License.

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...

Distribution and Genotyping of Infectious Hematopoietic Necrosis Virus in Farmed Rainbow Trout and Autochthonous Salmonids in North Macedonia

Publié en ligne: 20 févr. 2024

Pages: 37 - 43

Reçu: 18 déc. 2023

Accepté: 06 févr. 2024

DOI: https://doi.org/10.2478/macvetrev-2024-0013

Mots clés
cold-water aquaculture, phylogeny

© 2024 Aleksandar Traјchovski et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Distribution and Genotyping of Infectious Hematopoietic Necrosis Virus in Farmed Rainbow Trout and Autochthonous Salmonids in North Macedonia

Publié en ligne: 20 févr. 2024

Pages: 37 - 43

Reçu: 18 déc. 2023

Accepté: 06 févr. 2024

DOI: https://doi.org/10.2478/macvetrev-2024-0013

Mots cléscold-water aquaculture, phylogeny

© 2024 Aleksandar Traјchovski et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Mots clés
cold-water aquaculture, phylogeny