Red and melanized focal changes in the white skeletal muscle of farmed rainbow trout Oncorhynchus mykiss

被引:2
|
作者
Bjorgen, Havard [1 ]
Brimsholm, Malin [1 ]
Lund, Morten [2 ]
Dahle, Maria K. [3 ]
Rimstad, Espen [4 ]
Koppang, Erling Olaf [1 ]
机构
[1] Norwegian Univ Life Sci, Fac Vet Med, Unit Anat, N-1433 As, Norway
[2] Pure Salmon Kaldnes, N-3241 Sandefjord, Norway
[3] Norwegian Vet Inst, N-1433 As, Norway
[4] Norwegian Univ Life Sci, Fac Vet Med, Unit Virol, N-1433 As, Norway
关键词
Fillet; Melanin; Melano-macrophage; Rainbow trout; Skeletal muscle; Piscine orthoreovirus 1; Salmonid alphavirus; SALMO-SALAR L; ATLANTIC SALMON; INFLAMMATION;
D O I
10.3354/dao03797
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Fillet discoloration by red and melanized focal changes (RFCs and MFCs) is common in farmed Atlantic salmon Salmo salar. In farmed rainbow trout Oncorhynchus mykiss, similar changes have been noted, but their prevalence and histological characteristics have not been investigated. Thus, we conducted a study encompassing 1293 rainbow trout from 3 different farm sites in Norway, all examined at the time of slaughter. Both macroscopic and histological assessments of the changes were performed. Reverse transcription (RT)-qPCR analyses and in situ hybridization (ISH) were used to detect the presence and location, respectively, of potential viruses. Only 1 RFC was detected in a single fillet, while the prevalence of MFCs ranged from 1.46 to 6.47% between populations. The changes were predominantly localized in the cranioventral region of the fillet. Histological examinations unveiled necrotic myocytes, fibrosis, and regeneration of myocytes. Melano-macrophages were found in the affected areas and in myoseptal adipose tissue. Organized granulomas were observed in only 1 fish. Notably, the presence of inflammatory cells, including melano-macrophages, appeared lower compared to what has been previously documented in Atlantic salmon MFCs. Instead, fibrosis and regeneration dominated. RT-qPCR and ISH revealed the presence of piscine orthoreovirus 1 (PRV-1) and salmonid alphavirus (SAV) in skeletal muscle. However, these viruses were not consistently associated with lesioned areas, contrasting previous findings in Atlantic salmon. In conclusion, rainbow trout develop MFCs of a different character than farmed Atlantic salmon, and we speculate whether the observed pathological differences are contributing to their reduced occurrence in farmed rainbow trout.
引用
收藏
页码:201 / 213
页数:13
相关论文
共 50 条
  • [31] Quality assessment of farmed rainbow trout (Oncorhynchus mykiss) during chilled storage
    Rezaei, M.
    Hosseini, S. F.
    JOURNAL OF FOOD SCIENCE, 2008, 73 (06) : H93 - H96
  • [32] A visceral mycosis in farmed rainbow trout (Oncorhynchus mykiss) caused by Neopyrenochaeta submersa
    Rehulka, Jiri
    Kubatova, Alena
    Hubka, Vit
    MEDICAL MYCOLOGY CASE REPORTS, 2023, 41 : 4 - 7
  • [33] Effect of density on the routine metabolic expenditure of farmed rainbow trout (Oncorhynchus mykiss)
    Lefrançois, C
    Claireaux, G
    Mercier, C
    Aubin, J
    AQUACULTURE, 2001, 195 (3-4) : 269 - 277
  • [34] Histomorphometrical studies of vertebral bone condition in farmed rainbow trout, Oncorhynchus mykiss
    Deschamps, M. -H.
    Sire, J. -Y.
    JOURNAL OF APPLIED ICHTHYOLOGY, 2010, 26 (02) : 377 - 380
  • [35] A histopathological study of Hexamitiasis in farmed rainbow trout (Oncorhynchus mykiss) fry in Turkey
    Timur, G.
    Karatas, S.
    Akayli, T.
    Ercan, M. D.
    Yardimci, R. E.
    BULLETIN OF THE EUROPEAN ASSOCIATION OF FISH PATHOLOGISTS, 2009, 29 (03): : 104 - 108
  • [36] Genetic Structure Profile of Rainbow Trout (Oncorhynchus mykiss) Farmed Strains in Greece
    Martsikalis, Petros
    Gkafas, Georgios A.
    Apostolidis, Apostolos P.
    Exadactylos, Athanasios
    TURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 2014, 14 (03) : 749 - 757
  • [37] Cranial Mandibular Fibrosis Syndrome in Adult Farmed Rainbow Trout Oncorhynchus mykiss
    Cano, Irene
    Worswick, John
    Mulhearn, Brian
    Green, Matt
    Feist, Stephen W.
    Clinton, Morag
    PATHOGENS, 2021, 10 (05):
  • [38] First occurrence of Streptococcosis affecting farmed rainbow trout (Oncorhynchus mykiss) in Turkey
    Diler, Ö
    Altun, S
    Adiloglu, AK
    Kubilay, A
    Isikli, B
    BULLETIN OF THE EUROPEAN ASSOCIATION OF FISH PATHOLOGISTS, 2002, 22 (01): : 21 - 26
  • [39] Changes in blood serum parameters in farmed rainbow trout (Oncorhynchus mykiss) during a piscine lactococcosis outbreak
    Esposito, Giuseppe
    Bergagna, Stefania
    Colussi, Silvia
    Shahin, Khalid
    Rosa, Roberta
    Volpatti, Donatella
    Faggio, Caterina
    Mossotto, Camilla
    Gabetti, Alice
    Maganza, Alessandra
    Bozzetta, Elena
    Prearo, Marino
    Pastorino, Paolo
    JOURNAL OF FISH DISEASES, 2024, 47 (10)
  • [40] Prevalence and severity of cardiac abnormalities and arteriosclerosis in farmed rainbow trout (Oncorhynchus mykiss)
    Brijs, J.
    Hjelmstedt, P.
    Berg, C.
    Johansen, I. B.
    Sundh, H.
    Roques, J. A. C.
    Ekstrom, A.
    Sandblom, E.
    Sundell, K.
    Olsson, C.
    Axelsson, M.
    Grans, A.
    AQUACULTURE, 2020, 526