[RML] Tropical Fish Granuloma

Adrian R. Tappin (atappin at ecn.net.au)
Mon, 15 Jun 1998 08:01:20 +1000

In my continuing quest to find a solution to the Mycobacteriosis problem
faced by fishkeepers I stumbled across an article written in 1976 on
Tropical Fish Granuloma. I will be reprinting the article in a future ANGFA
Bulletin. However, here is an interesting extract:

"Mansson reported a similar case in Sweden in 1970, and identified Daphnia
as a possible source of infection. Mansson found M. marinum not only in a
patient's skin lesions, but also in sand snails and dead fish in the
patient's aquarium, and in mud in a pond from which Daphnia had been
collected and fed to the fish. Also in 1970 were reported three more cases
of M. marinum infection in California, all of aquarists who cut their hands
just before or during work on a tropical aquarium.

The first cases in the southern hemisphere were reported from Auckland, New
Zealand, in 1971. One was a tropical fish keeper at the Auckland Zoo,
another a pet shop owner, and a third a part time assistant in a pet shop.
M. marinum was isolated from all three cases. Tanks at the Zoo and the pet
shops, and also the elephant pond at the Zoo from which the keeper collected
Daphnia, were checked for the presence of M. marinum. It was found in five
tanks at the Zoo, and in a dead ram and a dead axolotl at the Zoo, but not
at the other sites. Cultures from a Danish brand of dried daphnia were also
negative (drying or freeze-drying would not kill M. marinum if it were
present)."

Adrian.
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Adrian R. Tappin
"Home of the Rainbowfish"
http://www.ecn.net.au/~atappin/home.htm
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