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Posted By: Greg Dunlap <gregandeileen@juno.com>
Date: Thursday, 31 October 2002, at 5:30 p.m.

This bacterial I got with the Black Tetras is a MEAN bastard. I have had them in iso for 8 days, and I am still fighting the infection!

I am done with the ich-med. But the Spectrogram could not knock this stuff out, even after a week (first failure EVER!).

I went and got some Maracyn-2. It is an internal infection, of that I have no doubt, most likely gram-negative.

I have been using the Spectrogram and the Maracyn Two for three days now. The blood-streaks in the tails have been fought to a minimum, but are still there. The fish seem more comfortable and are eating well. The reaction to the meds indicates it is a gram-neg, but a nasty one.

I was told by a dealer about a month ago Tetras are being mass-bred in tanks and huge quantities of antibiotics are being used to keep them healthy (like poultry). I seem to have a case of that here- an antibiotic resistant bacterial infection.

These Black Tetras are TOUGH little fish (much tougher than Neons) and I suspect most survive the barrage of antibiotics but carry resistant diseases with them because they are so tough.

This is the only disease I have ever seen in quarantine that did not "cure or kill". I will continue with the treatment for another week or so, and if I can't rid the fish of the infection I will stop the meds. I have no doubt they will then die, but the good thing is I never put them into my tank.

This is the toughest bacterial infection in fish I have ever seen. Any suggestions would be appreciated.

I am considering switching to erythromyacin and seeing if that will clear it up (I have heard it sometimes works where Maracyn fails). I have it fought back about 50%, but I can't seem to drop it further.

If they had gone into the main I have no doubt it would have been a disaster. And if these die, I will probably quit buying Tetras altogether. What I have been told about the way they are being bred seems to be true. I have never had a problem with Zebras or other small fish like this, only with Tetras. GREG

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