Can Ulcerative Dermal Necrosis (UDN) in Atlantic salmon be attributed to ultraviolet radiation and secondary Saprolegnia parasitica infections?

Cyril Henard, Marcia R. Saraiva, Magdalena E. Ściślak, Tahmina Ruba, Debbie McLaggan, Patricia Noguera, Pieter van West*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

Abstract

Ulcerative dermal necrosis (UDN), a chronic skin condition, affects primarily mature wild salmonids returning from the sea to freshwater for their spawning. The involvement of water moulds such as Saprolegnia parasitica as a secondary pathogen in this disease is clear but the identification of a primary cause or of primary pathogen(s) remains elusive. In this opinion article, we re-visit UDN regarding epidemiology, pathology and aetiology and speculate the potential involvement of UV radiation in the initiation of UDN in salmonid fish returning from the sea.

Original languageEnglish
Pages (from-to)70-75
Number of pages6
JournalFungal Biology Reviews
Volume40
Early online date20 Apr 2022
DOIs
Publication statusE-pub ahead of print - 20 Apr 2022

Keywords

  • Atlantic salmon
  • Saprolegnia parasitica
  • Skin damage
  • Stress factor
  • Ulcerative dermal necrosis
  • Ultraviolet radiation

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