I have updated the Fish Tuberculosis (TB) article from "American Aquarium"
Here is a quote from the article:
"Another myth about Fish TB, especially since it seems to have become the
aquarium fish disease "De Jour" (disease of the day), is its
transmission.
Based on emails, phone calls and discussions with my maintenance
friends, you would think every fish that is sick now suddenly has this
disease.
While it certainly seems to be more common and virulent as per confirmed
cases, it is NOT commonly present in an aquarium (unlike Aeromonas,
Columnaris, or Pseudomonas bacterium).
So in the case of fish that have been living in an aquarium for months
and often years without any outside exposure to other fish, the facts
are
it is impossible for the fish to suddenly come down with a Mycobacterium infection!
Usually this false diagnosis with no history of possible exposure is
simply the result of a simply weak or old fish showing symptoms that are
often common to Fish Mycobacterium (TB)."
Resource:
http://www.aquarium-pond-answers.com/2012/04/tb-in-fish-mycobacterium-tuberculosis.htmlCarl