Try the Cornell University site.. they have pretty good medical info...
There is also a Yahoo FELV+ group where members seem to share contacts &
experience...
Also, just in case, make sure your cat had both the Elissa test (done right
in the office) and the IFA test (bloodwork sent out to lab).  Was he an
indoor-outdoor cat?  As I understand adult cats can only contract Leukemia
from prolonged exposure to other FELV+ cat...

You say positive for feline leukemia, but I suspect what you mean is
positive for feline leukemia virus.  As another poster suggested, it's a
good idea to have the cat rechecked, both with the ELISA and IFA test.  I
had a kitten test positive, then negative; but if your cat has such serious
clinical signs, I wouldn't be optimistic for a reversal.  Another thing to
consider is getting a referral to a specialist in the area if possible (I've
gone to the Animal Medical Center in New York and local specialist
practices); sometimes this is a tradeoff between the stress on the cat of
traveling what may be a considerable distance to see the specialist and the
value of the specialist itself.

There's a lot of information available on FeLV on the Web and elsewhere;
another site is:
http://www.winnfelinehealth.org/health/FeLV.html

Good luck.

JA Golczewski, Ph.D.
http://users.rcn.com/jigo/jg.HTM
Updates, free book on health and life-extension

Have your cat tested for Hemobartonella felis. --  H. felis is a parasite
that attaches itself to surface of RBCs and shortens the life of the RBCs --
but far more damage is caused to the RBCs by the cat's intense immune
response to the parasite attached to the cell than by the parasite itself.
Haemobartonel?losis is associated with an increased incidence of FeLV
infection.  So its possible that the parasite reduced your cat's resistance
to FeLV and permitted an infection that the cat may have otherwise resisted
or allow a latent infection to re-emerge and initiate persistent, or
hopefully, only transient viremia. OTOH, FeLV can suppress the cat's normal
immune response - so FeLV might increase the cat's susceptibility to
haemobartonellosis or even convert a latent H. felis infection into a
full-blown disease.

You should have the test run at least four times on four consecutive days
because H. felis parasitemia is cyclic - IOW, the parasite can disappear and
reappear in the blood sometimes in as little as 2 hours or less... Also, its
absolutely essential that your vet uses *fresh* blood for the tests and
prepares the smears right away because the parasite usually detaches itself
from RBCs in refrigerated anticoagulated blood and in vitro.  Bad timing
and/or improperly collected and stored blood will lead to false negative
results in an infected cat.  Tests results will also turn out negative if
the tests are run after you begin treatment because the parasites disappear
from the blood while the cat is being treated with tetracyclines.  Thus the
test can't be used to monitor therapy.

If you go with interferon, I'd go with daily high-dose parenteral r-HuIFN-a
preceeded by transfusions for a month as the initial therapy rather than the
low-dose PO 7 on/7 off protocol.  Transfusions will reduce the viral
oad  -- and even a temporary reduction in the viral load might allow the
cat's immune system to mount a stronger and more effective response.   When
the results are good, they're very good!  We have a few FeLV cats still
going strong >6 years post IFA+!

Best of luck,

Phil

My cat Mimi was FLV+ I gave her interferon. Some also give immunoglobulin (sp?)
for FLV. When she wasn't eating, I gave her Nutrical gel. Some also give
T-factor capsules. Just make sure it's not the AVES t-factor which is a total
scam. Lots of love, a low stress environment, proper nutrition and he will do
much better. My Mimi cleared the FLV.

Just an update - our boy is doing much better. He's eating and playing and
picking on his sister again. I don't want to jinx the recovery, but I think
we're gonna get to keep him (or visa versa) for a while longer. He's on a
steroid and has started Interferon. We'll take him in for some blood work
next week to see how his red cell count is doing.

Here're some photos from last week:
http://www.amazon.ofoto.com/BrowsePhotos.jsp?showSlide=true&Uc=2e2r5yj.9ut7b
kgv&Uy=r1n3ro&Upost_signin=BrowsePhotos.jsp%3FshowSlide%3Dtrue&Ux=0

Thanks for the info and advice.

Dave

Update - his blood tests on Friday showed that he had a 12% red blood cell
volume, so he went in for his second tranfusion on Saturday.

His post-tranfusion numbers showed only 14%  red blood cell volume. So much
for the transfusion :(

The test also showed that his body is producing new RBCs and that the
steriods he's on are keeping his immune system from destroying them. And he
gained a 10th of a pound :)

The vet is now suggesting 125mg of vitamine C twice a day.

So it goes,

Dave

Update - thanks for all the kind words and good advice. Our boy is back from
the vet after our vacation and seems to be doing fine except for not being
very interested in eating. He has always been  little chow hound, so this is
a bad thing. We've tried everything for food, and (of the few things he
likes) he likes Tender Vittles of all things. But he's not eating enough.

Any ideas?

TIA,

Dave