Ulcerative dermal necrosis

Ulcerative dermal necrosis

Ulcerative dermal necrosis (UDN) is a chronic dermatological disease of cold water salmonid fish that had a severe impact on north Atlantic Salmon and sea trout stocks in the late 1960s, the 1970s and 1980.

Affected fish developed severe skin lesions over large parts of their body which penetrated into skeletal muscle. The onset of symptoms only occurred after migration into freshwater. Lesions became quickly infected with overgrowths of "Saprolegnia" fungus giving the affected fish an appearance of being covered in slimy white pustules. The most severely affected fish frequently die before spawning.

Although the worst effects of the disease were seen in the 1970s and 1980, even now large numbers of salmon will succumb to the disease after spawning. This is thought be due in part to their weak post-spawning condition, and lack of food for several months whilst in the river.

Those fish that do make it back to the sea are thought to make a good recovery.


Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • ulcerative dermal necrosis — noun A fungal disease of salmon • • • Main Entry: ↑ulcer …   Useful english dictionary

  • ulcerative dermal necrosis — a disease affecting salmonids returning from the sea to fresh water with head lesions. The cause is probably viral but the lesions are typically infected by bacteria and fungi. Abbreviated as UDN …   Dictionary of ichthyology

  • UDN — ulcerative dermal necrosis …   Medical dictionary

  • UDN — • ulcerative dermal necrosis …   Dictionary of medical acronyms & abbreviations

  • UDN — ulcerative dermal necrosis ( a disease affecting salmonids returning from the sea to fresh water with head lesions. The cause is probably viral but the lesions are typically infected by bacteria and fungi) …   Dictionary of ichthyology

  • Salmon — is the common name for several species of fish of the family Salmonidae. Several other fish in the family are called trout. Salmon live in both the Atlantic and Pacific Oceans, as well as the Great Lakes and other land locked lakes.Typically,… …   Wikipedia

  • UDN — can stand for: *National Democratic Union ( União Democrática Nacional ),a political party that existed in Brazil between 1945 and 1965 *Ulcerative dermal necrosis, a disease of salmon and trout *United Daily News, a Taiwanese newspaper *Unreal… …   Wikipedia

  • List of cutaneous conditions — This is an incomplete list, which may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. See also: Cutaneous conditions, Category:Cutaneous conditions, and ICD 10… …   Wikipedia

  • syndrome — The aggregate of symptoms and signs associated with any morbid process, and constituting together the picture of the disease. SEE ALSO: disease. [G. s., a running together, tumultuous concourse; (in med.) a concurrence of symptoms, fr. syn,… …   Medical dictionary

  • Psoriasis — Classification and external resources A person whose back and arms are affected by psoriasis ICD 10 L …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”