disease carriers in QT ...

[Allmost]

okay so lets consider a hypothetical situation ...

my DT gets velvet, by introducing a new fish with no QT.

everything dies, 2 wrasses survive.

explanation is : the wrasses carry the disease, but its not effective enough on them to kill them ? [true or false] ?


I remove the Wrasse, and give it to LFS, they sell it to next guy ... the fish still carrying the disease.

he QTs it for 2 months, doesnt notice anything and introduce to his DT .

will that kill all his fish ?


disease with no host would die. but what in case of wrasses or some special cases ? does the disease at one point becomes inactive ? does it die off ?


thoughts ?


notes :
- I said "hypothetical" situation.
- just the best case I could think of. mostly interested in the conclusions we can draw from it.
- could be useful info for QTing fishes that show no sign of disease.

 

[degibson84]

Hypothetically yes. My wife introduced fish while I was out of town. Ended up with ich and most of the fish survived. Now even after qt any new addition ends up with ich. Some survive some don't. The fish that already had ich don't ever show signs of it again.

 

[Allmost]

Hypothetically yes. My wife introduced fish while I was out of town. Ended up with ich and most of the fish survived. Now even after qt any new addition ends up with ich. Some survive some don't. The fish that already had ich don't ever show signs of it again.

I see ! interesting, any tangs ?

guess if you QT new fish, and feed them alot and get them ready, they might have better chance of fighting the invisible ich.

but thats a good example ... cause it prety much trows away the QT period for just observations ... we might be better off thinking all fish come with all sorts of diseases one could think of !

 

[snorvich]

okay so lets consider a hypothetical situation ...

my DT gets velvet, by introducing a new fish with no QT.

everything dies, 2 wrasses survive.

explanation is : the wrasses carry the disease, but its not effective enough on them to kill them ? [true or false] ?


I remove the Wrasse, and give it to LFS, they sell it to next guy ... the fish still carrying the disease.

he QTs it for 2 months, doesnt notice anything and introduce to his DT .

will that kill all his fish ?


disease with no host would die. but what in case of wrasses or some special cases ? does the disease at one point becomes inactive ? does it die off ?


thoughts ?


notes :
- I said "hypothetical" situation.
- just the best case I could think of. mostly interested in the conclusions we can draw from it.
- could be useful info for QTing fishes that show no sign of disease.

In your hypothetical, the fish that survived velvet (not ich), developed a temporary immunity (six months) but carry it. If they were transferred to another system, they would bring velvet with them.

This hypothetical cannot be extended to any of the other parasites including ich.

 

[snorvich]

I see ! interesting, any tangs ?

guess if you QT new fish, and feed them alot and get them ready, they might have better chance of fighting the invisible ich.

but thats a good example ... cause it prety much trows away the QT period for just observations ... we might be better off thinking all fish come with all sorts of diseases one could think of !

Actually, no it is not a good example. You can eliminate ich from the equation completely using tank transfer. 30 days of observation after the 12 days of tank transfer will be sufficient for velvet, brook, uronema, flukes to present.

 

[Allmost]

Steve, the last 2 post contradict one another ? or maybe I didnt get it fully, so gonna ask u more questions if I may.

so a fish can carry velvet, and develop immunity, and we will never know it ? is there a limit to this ? what is the 6 month thing about ?


what is different about ich ? or you mean ALL fish should go through TT to make sure they are not ich carriers ? in case it has develped ich immunity ?

 

[scuzy]

in your original question the new person gets the fish and QT it for 2 months in theory if he QT and medicated the 2 months in QT then that fish will not have velvet. If he didn't medicate and just put in QT to observe then yes the parasite will transfer to his tank.