New Kittens tested positive for Feline Leukemia

[Jewels526]

We took our new kittens in for a check-up yesterday and they tested positive for feline leukemia. (These are two babies we brought home about 6 weeks ago from a desert by my fiance's office. When we brought them home they had ringworm and had just gotten over that.) We have two other adult cats that we took down to get tested and so far have tested negative. The vet wants us to get them rechecked in a month because the incubation period is 3-4 weeks. I am unsure if I should euthanize these kittens, I don't want to infect our adult cats, or if I should keep these kittens and keep them separated from our adult cats(they have been thus far due to the ringworm) and keep them locked in a room for any longer. Any advice?