Fish Health - Furunculosis

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Furunculosis is getting more common. This infection is a species jump from game fish, trout and salmon where it causes many losses.

funiculosis

funiculosis
Ulcers are deep into the body wall and very large - they look like the fish has been filleted in its latter stages.

This disease seems to have got a grip in mud ponds in warmer climes.

The infectious agents are aeromonas hydrofiller, aeromonas salmonicida and some strains of pseudomonas.

This disease also occurs as a secondary infection after a primary infection caused by skin flukes or other skin or gill parasites.

It usually occurs, or should I say starts, in the spring as temperatures rise and is mainly encounted in poor water.

I find that over feeding in the spring and inefficient filtration is one cause, whilst not checking water quality is another. Also stripping filters out for a spring clean before the water is warm enough to reseed them. In other words not cleaning filters in September when water still has a high enough temperature to reseed.

The problem is this infection responds very poorly to any treatments. I find success is around 20% and once holes is down to 5% (that's just what the start of this disease looks like - holes, just like a heron attack.