[Zbrafish] zebrafish disease

swarvegorilla via zbrafish%40net.bio.net (by fatcatfish At optusnet.com.au)
Wed Dec 13 05:33:56 EST 2006

"christian lawrence" <clawrence At rics.bwh.harvard.edu> wrote in message 
news:mailman.21.1162574718.14439.zbrafish At net.bio.net...
> The veterinarians that monitor the list will no doubt have more informed 
> and
> complete recommendations, especially with regards to diagnosis and
> medications, but in general, I would euthanize every one of the fish you 
> got
> from the market, every fish that came in contact with them, and completely
> sterilize everything they touched and start again.
> If this is not an option, I would:
> 1. Make sure your h2o quality is good and stable.  Ammonia and nitrites 
> need
> to be zero, and nitrates low.  pH should be stable, ideally around 7.

A few chunks of coral/shellgrit/marble will help here if your water is much 
more acid

> 2. Kill everything that looks sick.  Aggressive culling is very important.

Take the chance to chuck a chunk of gill under a microscope.
Don't waste these sick fish!! Learn whats going down!
Sacrificial fish can tell 1000 times more than a dead one.

> 3. Cut back on the feeding.  Feed clean live food (i.e. Artemia from
> decapsulated cysts) once a day or once every other day.

spirulina flakes is another very concentrated food that works well (just 

> 4. Lower the temperature. Slowly.  22-24 is fine if you acclimate them.
> 5. Raise the conductivity of your water.  Again, not all at once.  For
> example, if it is 500 uS, then bring it to 1000 over a week or so. 
> Raising
> this parameter is especially important if your maintenance conductivities
> are below 500uS.
> 6. Don't handle the fish. No breeding, no disturbance.
> When things stabilize, you can start to add more feeding, raise temp, and
> start to breed them again.   Keeping at elevated conductivities is 
> probably
> not a bad idea.   But when you think things are stable, start to bring
> things back into operation slowly and carefully.  And avoid introducing 
> fish
> from an outside source directly into your facility in the future.

at very least quarantine them in a tank outside the system for 2 weeks

> Good luck,
> Chris

just echo that good luck there
altho I am not a fan of full on steralisations
Chris has the plan!
I'd dose with a white spot med (prob just common parasite out of control in 
the closed system)

> Christian Lawrence
> Brigham and Women's Hospital
> Karp Family Research Laboratories 06-004B
> One Blackfan Circle
> Boston, Massachusetts 02115
> Tel: 617.355.9041
> Fax: 617.355.9064
> -----Original Message-----
> From: zbrafish-bounces At oat.bio.indiana.edu
> [mailto:zbrafish-bounces At oat.bio.indiana.edu] On Behalf Of jenny
> Sent: Thursday, November 02, 2006 10:12 PM
> To: bionet-organisms-zebrafish At net.bio.net
> Subject: [Zbrafish] zebrafish disease
>    Hi, everyone! I have a problem with breeding the zebrafish.I bought two
> hunderd adullt zebrafish from the nearby market in our city about two 
> weeks
> ago. within first 5-6 days,the fish seems healthy and spry, but now 10-20
> fish has got serious disease, the symptom describe as follows:white spots
> spreads in the fin and back; open their bloody mouth and can not shut 
> up,so
> they can not eat food freely and starve to die; decayed tails and gills;
> swim slowly and so on. I have pick up the ill fish and dissolve some drug 
> to
> prevent the desease,but effect is not so good.
>    So I can not decide what kind of disease it is and have no right method
> to cure the fish, It has make great lost for our laboratory. Is there 
> anyone
> who has relative knowledge and some good ideas?
>    Thanks for your replying!
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