Red pest (Purpura cyprinorum)

Symptoms

Yellow-orange ulcers
Skin shows ulcerated lesions of distinctive yellow-orange colour.
Belly of fish dark red colour
The entire belly of the fish is a deep red colour from which comes the name of the disease.
Ventral and anal fins red
All of the lower fins fins of the fish are suffused with a deep red colour.
Subepithelial petechiae
Small bloody red dots or effusions, evident below skin.
Haemorrhages - skin
Bloody haemorrhages are apparent over several parts of the skin.
Hanging at surface
Fish stays at water surface all the time.
Ulcers - irregular
Irregular shaped ulcers are evident on the skin.

Causes

Bacteria as named above, typically infects carp and tench, disease with similar symptoms but a different bacteria affects Eels.

Prognosis

Very contagious indeed, in both cases. Usually results in heavy casualties.

Treatment

Please login to see the treatment information.

Prevention


DNA and RNA diagnostic references
Megalocytiviruses.

From Viruses, 2012 Apr.4(4): 521-38

Kurita J. et al. Nat.Res. Inst. of Aquaculture Fisheries Res. Ctr.
Minamilise 519-0423 Japan

Pictures

There are 3 disease pictures available. Please log in to see them.

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