Velvet or rust disease (Oodinium limneticum)

Symptoms

Small dust-like gold-grey spots
The body is covered with a very fine dust-like spots of a gold-grey colour.
Flagellates on skin
Respiration rapid
Fish is breathing very fast, much faster than is normal.
Rubbing/scratching
Fish constantly rubs or scratches itself against any object available.
Fins folded
The fins of the fish remain in a closed position due to discomfort.

Causes

This is freshwater disease only, not the same as the Marine Oodinium. Cause is a parasitic dinoflagellate,viz. O.pillularis and O.Limneticum.

Prognosis

Not immediately fatal, normally takes a few days before casualties will occur in large numbers. However its reproductive rate is very high and it can rapidly spread.

Reasonable, if caught in time, & environmental conditions are first rate.

Treatment

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Contributors

Dr. Jacobs, Bruno
Fish Medical sprl
Esneux   Belgium

Pictures

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Videos

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