The "slow" disease is almost certainly Piscine TB (Mycobacteriosis) and this
could be too as each bacterial strain can vary in virulence or
"infectivity".
It could also be some other form of septicaemia causing blood-borne
abscesses to be produced in the fish affected. Obviously some species of
fish have more host resistance than others and were not as susceptible.
Regards,
Bruce.
Bruce Hansen, A.N.G.F.A., Advancing Australian Aquatics.
Bruce Hansen, ANGFA, caring for our aquatic ecosystems.
Please visit us at http://www.ozemail.com.au/~fisher/angfa.htm
-----Original Message-----
From: Nitemaro2 at aol.com <Nitemaro2 at aol.com>
To: rainbowfish at pcug.org.au <rainbowfish at pcug.org.au>
Date: Monday, 24 August 1998 0:35
Subject: fast-killing bacterial Re: [RML] Ulcers on fish
>Actually this was something different from anything I had ever seen before.
>First to answer your questions. I have about 10 different species of
rainbows
>with all of them in at least multiples of twos. I also have four large
angels,
>three severums, 10 Jullii cories, and three gouramis. I don't really know
what
>they do at night since I have the light on a timer and it goes off after I
go
>to bed and turns on before I get up. It turns out that this disease was
>bacterial and killed the fish in three days which makes me mad because this
>was one of my Wanamensis. What I thought it was usually doesn't kill the
fish
>for months and gets bigger during that time and looks most like a type of
>cancer with extra scales and that sort of thing. I've seen bacterial
diseases
>many times in the past but none of them had a mortality speed like this one
>did. None of my other fish got infected. (thank God) What does everybody
>think? Joe
>