Re: [RML] Tropical Fish Granuloma

Bruce Hansen (bhansen at
Mon, 15 Jun 1998 19:22:54 +1000

Just as an aside to the fish Tb problem, especially as it applies to
Rainbows and their kin - has anyone seen it in Blue-eyes?

I haven't or even heard of it in them.


Bruce Hansen, ANGFA, caring for our aquatic ecosystems.

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> From: Mach T. Fukada <fukada at>
> To: rainbowfish at
> Subject: Re: [RML] Tropical Fish Granuloma
> Date: Monday, 15 June 1998 9:32
> Allmost the same thing that the vet that deals with fish here in Hawaii
> said. It is everywhere. It can be present on plants, moist areas,
> anything. There is allomst nothing we can do about it. More importantly
> is to determine the conditions that makes M. marinum pathogenic. It
> like most of the time it is a saprophyte or weak pathogen that affects
> of compromised health (poor water quality (pH, ammonia, etc) over
> etc. There have been reports of virulent pathogeninc strains running
> ammuck and wiping out people (Fred Morita's swortail, platty, viartus,
> opperation). In these cases virtually overnight it spread from a
> asymptomatic fish to the rest of the tanks. However, I will admit that
> after testing his water it seems that it had a hight pH (8.0) and now
> buffering (KH effectively 0). So his pH fluctuates widely and I am sure
> results in the fish being stressed out.