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It appears Noche is infected with the virus, and a risk to the other cats. It is good he is kept separated.
An IFA test would confirm the virus is infecting him, and if that is positive, he will probably not live long. I know of no effective treatment for cats that are infected. You can support them with blood transfusion, good diet, and steroids may bring about a remission for awhile. I have tried immune stimulants, and interferon, but have not seen it help much.
I don't see any blood levels in your reports; I don't see actual red and white blood cells counts, only that she is leukemia positive. One report says there is "marked leukopenia/neutropenia" meaning low while blood cells numbers, but the actual numbers are not there, just an interpretation of the numbers.
If she does have low white blood cells and red cells (there is no red cell count in the forms you sent me), then I would try steroids to make her feel better.
that is the interpretation that there is marked neutropenia and leukopenia and nucleated red blood cells, but no counts or numbers.
Going by that veterinarian's interpretation, all I know is that there are low (but I don't know how low) white blood cells counts, and that she is probably anemic (low red cells count but again no actual number to tell me how low).
I have opened all 5 of the links you sent; no numbers on any of them. No chemistries, no blood counts. If you look at them there are no numbers at all (except case numbers).